Dr. Ratio
★★★★★

Dr. Ratio Build

Dr. Ratio is a 5★ Imaginary character on the Path of The Hunt in Honkai: Star Rail. Below are the character's stats, skills and Eidolons — plus a pity calculator if you plan to pull.

Released: 17/01/2024 · v1.6· Updated: 12/08/2026
Updated for version 4.4 · 15/07/2026
Calculate pity to pull this character →

Voice Actors

JPENCNKR
Takeuchi Shunsuke Jordan Paul Haro Sang Yuze Lee Donghoon (이동훈)
Community usage · phase 4.4.2
Stats from 13,965 real player profiles (Memory of Chaos) · community player data
Building Dr. Ratio — just follow the numbers

Active codes (10)

Redeem codes →
STARRAILGIFT
4TKSX77Y58QK
30-second summary

Worth pulling if you love a bursty single-target hunter and already own debuff-appliers. Skip if you lack debuff sources or mainly need wave-clear.

1

30-second build

In a hurry? This box is all you need — details below
BodyCRIT Rate / CRIT DMG FeetSPD SphereImaginary DMG RopeATK%

Sub-stat priority: CRIT DMG ≧ CRIT Rate > ATK% > SPD

2

Verdict & playstyle

How strong, worth pulling, how to play
Memory of Chaos 4/5
Pure Fiction 2/5
Apocalyptic Shadow 3.5/5
Imaginary (Dr. Ratio's element) is a listed Weakness in 1 of 4 Anomaly Arbitration phases this season.
See this season's Anomaly Arbitration →
Note for beginners

Dr. Ratio is notably weaker in Pure Fiction (only 2/5 in the build rating) — think twice before investing if that's your main mode.

Should you pull Dr. Ratio?

Worth pulling if you love a bursty single-target hunter and already own debuff-appliers. Skip if you lack debuff sources or mainly need wave-clear.

Pros
  • Elite single-target and toughness-break damage
  • Excellent self-energy generation from follow-ups
  • Fully functional at E0, no eidolons required
Cons
  • Team must land 3+ debuffs to unlock his kit
  • Very weak in wave-clear content (Pure Fiction)
  • Picky about allies and partly power-crept by newer DPS

How to play

Each turn Skill the target that already has 3+ debuffs to trigger his follow-up, favoring an enemy with DEF shred. Hold Ultimate to open the Disputation buff before your big hits, then farm extra follow-ups from Topaz or allies.

3

Full build

Light cones, relics, stat targets — with reasons

Best Light Cones for Dr. Ratio

Recommendation order by current meta — the first is strongest, the rest are alternatives in decreasing priority. (Not a simulated DPS %.)

No signature Light Cone yet? Use this instead
Don't have anything from the ranked list above? A Secret Vow (4★) is an easy-to-get pick that's still in Dr. Ratio's good-build group.

Best Relics

BodyCRIT Rate / CRIT DMG
FeetSPD
SphereImaginary DMG
RopeATK%

Sub-stat priority: CRIT DMG ≧ CRIT Rate > ATK% > SPD

Stat targets

Targets: ~70-80% CRIT Rate on the sheet (100% in combat via cone/set), 180-200% CRIT DMG, 3000+ ATK, 134+ SPD. No EHR needed.

4

Teams

Best teammates to pair with

Best teams for Dr. Ratio

Standard: Topaz + Robin + Aventurine to max follow-ups. Debuff line: Jiaoqiu for durable debuffs + Robin.

Budget: Pela DEF shred + Tingyun + Gallagher.

Meta suggestions synthesized from global community consensus (Meta 2026-07). Figures come from game data — updated each patch.

5

Eidolons

How far to invest, which milestones matter

E0 is fully complete. E1 boosts follow-up damage, E2 is a strong Skill buff if you have spare pulls, and E6 is the real spike. None are needed.

E1
Pride Comes Before a Fall★★★★☆
The maximum stackable count for the Trace "Summation" increases by 4. When a battle begins, immediately obtains 4 stacks of Summation. Needs to unlock Summation first.
Raises the Summation stack cap by 4 and grants 4 stacks instantly at battle start, letting Dr. Ratio reach peak Summation value much earlier.
Dr. Ratio's Eidolon×1 Dr. Ratio's Eidolon
E2
The Divine Is in the Details★★★★☆
When his Talent's Follow-Up ATK hits a target, for every debuff the target has, deals Imaginary Additional DMG equal to 20% of Dr. Ratio's ATK. This effect can be triggered for a maximum of 4 time(s) during each Follow-Up ATK.
The Talent's Follow-Up ATK deals extra Imaginary DMG per debuff on the target, up to 4 times, meaningfully boosting overall damage.
Dr. Ratio's Eidolon×1 Dr. Ratio's Eidolon
E3
Know Thyself★★☆☆☆
Ultimate Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10.
Simply raises Ultimate and Basic ATK levels with no new effect, so its impact is fairly limited.
Dr. Ratio's Eidolon×1 Dr. Ratio's Eidolon
E4
Ignorance Is Blight★★☆☆☆
When triggering the Talent, additionally regenerates 15 Energy for Dr. Ratio.
Triggering the Talent additionally regenerates 15 Energy, a minor utility that slightly speeds up Ultimate uptime.
Dr. Ratio's Eidolon×1 Dr. Ratio's Eidolon
E5
Sic Itur Ad Astra★★☆☆☆
Skill Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
Only raises Skill and Talent levels with no new effect, mainly giving a small boost to existing damage numbers.
Dr. Ratio's Eidolon×1 Dr. Ratio's Eidolon
E6
Vincit Omnia Veritas★★★★★
Additionally increases the trigger count for "Wiseman's Folly" by 1. The DMG dealt by the Talent's Follow-Up ATK increases by 50%.
Adds 1 more trigger of Wiseman's Folly and increases the Talent's Follow-Up ATK DMG by 50%, creating a huge overall damage spike.
Dr. Ratio's Eidolon×1 Dr. Ratio's Eidolon
6

Skills & Traces

What to level first — tap each skill for details

Skill Leveling Priority

Talent ★★★★★ The Talent's Follow-Up ATK (338% ATK) is Dr. Ratio's main damage source, so it must be maxed.
Skill ★★★★★ The Skill both deals direct damage and is the trigger condition for the Talent's Follow-Up ATK, making it as important as the Talent.
Ultimate ★★★★☆ The Ultimate applies Wiseman's Folly to let allies trigger extra Talent follow-ups, valuable but leveled after the core Skill/Talent.
Basic ATK ★★☆☆☆ Basic ATK is rarely relevant since the playstyle revolves around the Skill and follow-up attacks, so it stays lowest priority like most DPS.
Trace priority: A6 = A2 > A4 Eidolon priority: E6 > E2 > E1 > E4 > E3 = E5

Skills

Mind is Might
Basic ATK Single Target Lv.10 +20 30

Deals Imaginary DMG equal to 140% of Dr. Ratio's ATK to one designated enemy target.

LevelEffect
Lv.1 Deals Imaginary DMG equal to 50% of Dr. Ratio's ATK to one designated enemy target.
Lv.2 Deals Imaginary DMG equal to 60% of Dr. Ratio's ATK to one designated enemy target.
Lv.3 Deals Imaginary DMG equal to 70% of Dr. Ratio's ATK to one designated enemy target.
Lv.4 Deals Imaginary DMG equal to 80% of Dr. Ratio's ATK to one designated enemy target.
Lv.5 Deals Imaginary DMG equal to 90% of Dr. Ratio's ATK to one designated enemy target.
Lv.6 Deals Imaginary DMG equal to 100% of Dr. Ratio's ATK to one designated enemy target.
Lv.7 Deals Imaginary DMG equal to 110% of Dr. Ratio's ATK to one designated enemy target.
Lv.8 Deals Imaginary DMG equal to 120% of Dr. Ratio's ATK to one designated enemy target.
Lv.9 Deals Imaginary DMG equal to 130% of Dr. Ratio's ATK to one designated enemy target.
Lv.10 (max) Deals Imaginary DMG equal to 140% of Dr. Ratio's ATK to one designated enemy target.
Intellectual Midwifery
Skill Single Target Lv.15 +30 60

Deals Imaginary DMG equal to 188% of Dr. Ratio's ATK to one designated enemy target.

LevelEffect
Lv.1 Deals Imaginary DMG equal to 75% of Dr. Ratio's ATK to one designated enemy target.
Lv.2 Deals Imaginary DMG equal to 83% of Dr. Ratio's ATK to one designated enemy target.
Lv.3 Deals Imaginary DMG equal to 90% of Dr. Ratio's ATK to one designated enemy target.
Lv.4 Deals Imaginary DMG equal to 98% of Dr. Ratio's ATK to one designated enemy target.
Lv.5 Deals Imaginary DMG equal to 105% of Dr. Ratio's ATK to one designated enemy target.
Lv.6 Deals Imaginary DMG equal to 113% of Dr. Ratio's ATK to one designated enemy target.
Lv.7 Deals Imaginary DMG equal to 122% of Dr. Ratio's ATK to one designated enemy target.
Lv.8 Deals Imaginary DMG equal to 131% of Dr. Ratio's ATK to one designated enemy target.
Lv.9 Deals Imaginary DMG equal to 141% of Dr. Ratio's ATK to one designated enemy target.
Lv.10 Deals Imaginary DMG equal to 150% of Dr. Ratio's ATK to one designated enemy target.
Lv.11 Deals Imaginary DMG equal to 158% of Dr. Ratio's ATK to one designated enemy target.
Lv.12 Deals Imaginary DMG equal to 165% of Dr. Ratio's ATK to one designated enemy target.
Lv.13 Deals Imaginary DMG equal to 173% of Dr. Ratio's ATK to one designated enemy target.
Lv.14 Deals Imaginary DMG equal to 180% of Dr. Ratio's ATK to one designated enemy target.
Lv.15 (max) Deals Imaginary DMG equal to 188% of Dr. Ratio's ATK to one designated enemy target.
Syllogistic Paradox
Ultimate Single Target Lv.15 +5 90 140

Deals Imaginary DMG equal to 288% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.

LevelEffect
Lv.1 Deals Imaginary DMG equal to 144% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.2 Deals Imaginary DMG equal to 154% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.3 Deals Imaginary DMG equal to 163% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.4 Deals Imaginary DMG equal to 173% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.5 Deals Imaginary DMG equal to 182% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.6 Deals Imaginary DMG equal to 192% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.7 Deals Imaginary DMG equal to 204% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.8 Deals Imaginary DMG equal to 216% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.9 Deals Imaginary DMG equal to 228% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.10 Deals Imaginary DMG equal to 240% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.11 Deals Imaginary DMG equal to 250% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.12 Deals Imaginary DMG equal to 259% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.13 Deals Imaginary DMG equal to 269% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.14 Deals Imaginary DMG equal to 278% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Lv.15 (max) Deals Imaginary DMG equal to 288% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Cogito, Ergo Sum
Talent Single Target Lv.15 +5 30

When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 338% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.

LevelEffect
Lv.1 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 135% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.2 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 149% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.3 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 162% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.4 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 176% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.5 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 189% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.6 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 203% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.7 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 219% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.8 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 236% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.9 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 253% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.10 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 270% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.11 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 284% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.12 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 297% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.13 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 311% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.14 When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 324% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Lv.15 (max) When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 338% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Attack
30

Attacks an enemy, and after entering combat, reduces their Toughness of the corresponding Type.

Mold of Idolatry
Technique Impair

After using Technique, creates a Special Dimension that Taunts nearby enemies, lasting for 10 second(s). After entering battle with enemies in this Special Dimension, there is a 100% base chance to reduce each single enemy target's SPD by 15% for 2 turn(s). Only 1 Dimension Effect created by allies can exist at the same time.

Major Traces

3 powerful passives (A2/A4/A6) — unlocked via Ascension
A2
Summation

When Dr. Ratio uses his Skill, for every debuff on the target, his CRIT Rate increases by 2.5% and CRIT DMG by 5%. This effect can stack up to 6 time(s).

A4
Inference

When Skill is used to attack an enemy target, there is a 100% base chance to reduce the attacked enemy target's Effect RES by 10% for 2 turn(s).

A6
Deduction

When dealing DMG to a target that has 3 or more debuff(s), for each debuff the target has, the DMG dealt by Dr. Ratio to this target increases by 10%, up to a maximum increase of 50%.

Weakness Break

How much Toughness each of Dr. Ratio's skills breaks — internal scale, matches the Bestiary
SkillMove typeToughness reduced
Mind is MightBasic ATK30
Intellectual MidwiferySkill60
Syllogistic ParadoxUltimate90
Cogito, Ergo SumTalent30
AttackOverworld Attack30

One full combo (Basic ATK + Skill + Ultimate) from Dr. Ratio breaks 180 Toughness in total.

Hits needed to break an enemy

Enemy rankToughness (median)Basic ATK hitsSkill casts
Minion 120 4 2
Elite 360 12 6
Elite Boss 540 18 9
Boss 540 18 9

134/231 enemies in our bestiary are weak to Imaginary — Dr. Ratio's own element. View the Bestiary → · View Imaginary-weak enemies →

7

Stats & Materials

Base stats at Lv.80 and what to farm

Nurture Priority Order

When resources are limited, spend them in this order
1. Character Level 2. Light Cone Level 3. Traces 4. Relics

Level 80 stats

HP
1,048
#62 of 90
ATK
776
#1 of 90
DEF
461
#55 of 90
SPD
103
#33 of 90
CRIT Rate
5%
CRIT DMG
50%
8

Dr. Ratio FAQ

What is the best Light Cone for Dr. Ratio?

The best Light Cone for Dr. Ratio is Baptism of Pure Thought (top pick). See F2P options in the Light Cones section above.

Is Dr. Ratio worth pulling?

Worth pulling if you love a bursty single-target hunter and already own debuff-appliers. Skip if you lack debuff sources or mainly need wave-clear.

What is the best team for Dr. Ratio?

Standard: Topaz + Robin + Aventurine to max follow-ups. Debuff line: Jiaoqiu for durable debuffs + Robin. Budget: Pela DEF shred + Tingyun + Gallagher.

How much Energy does Dr. Ratio's Ultimate cost?

Dr. Ratio's Ultimate costs 140 Energy. See the Skills section above for the Energy gain and Break DMG of every skill.

What materials does Dr. Ratio need to reach max Ascension?

See the full Ascension Materials list above, pulled directly from the latest game data.

Matching Light Cones

Path of The Hunt — a Light Cone only gives its bonus to matching-Path characters.
Light Cones →
How to read this build page

Every character build page has these parts: recommended Light Cone/Relic sets and stat table, a Trace/skill leveling order, Eidolon milestones worth considering, and a reference SPD threshold. Read them in that order — gear tells you "what to use", Traces tell you "what to level first", Eidolon tells you "is it worth pulling dupes", SPD tells you "how fast you need to be to keep the rotation on time". The section below explains how to read each part and applies the same way to every character on the site — check the exact numbers in the table above this section, since community sources sometimes differ by a few points.

Why the Light Cone and Relic picks make sense

Most characters have a "signature" Light Cone built for their exact role, plus a few cheaper substitutes from the standard banner or easy-to-get 3-4★ cones. Missing the signature isn't a dead end — most characters keep most of their power with a well-matched substitute, typically losing somewhere between a few percent and roughly a fifth of total damage depending on the setup, per most public comparisons.

  • Relic sets (2pc+2pc or 4pc) are picked for the set effect that fits that character's role (single-target DPS, AoE, shield/healing support, Break damage, and so on).
  • Main stats per slot (Body/Feet/Sphere/Rope) and substats follow a priority that changes by role: DPS roles usually chase CRIT Rate/CRIT DMG before ATK%; Break-focused roles prioritize Break Effect; support/healing roles often value Effect Hit/RES or Outgoing Healing over pure CRIT.

These weights differ per character and can shift slightly between ranking sources — follow the exact priority table above rather than applying one formula to every role.

Trace/skill leveling order by role (a general guideline, not a fixed rule)

There's no single order that's correct for every character, and community sources sometimes disagree depending on the team the character is used in — but the general pattern by role is:

  • DPS: level whichever skill (Skill or Ultimate) carries most of the damage for that character first, with Basic ATK usually last if it isn't the main damage source.
  • Support/Buffer: prioritize Traces that boost buff strength or the skill that applies the effect over Basic ATK, since this role's value comes from lifting the team rather than personal damage.
  • Healer/Shielder: prioritize the main healing or shield skill first, since that is the reason the team runs this character.
  • Break/CC: prioritize whichever skill contributes the most Toughness Damage, since the Break/Weakness Break window is where the team dumps damage.

Major Traces unlock at fixed ascension levels in-game, not by choice — but which one to level first (when resources are limited) should follow the role priority above. Since the exact order can differ between ranking sources, check the specific recommendation in the table above for this character.

Eidolons: how far E0 gets you, and which milestone is worth considering

General rule: most characters at E0 (no duplicates) already handle most content, even 5-star characters. Eidolons are a duplicate-fueled upgrade system — higher levels cost more resources for a smaller power gain, and the actual gain varies a lot per character (some barely change role at E0, others shift how they're played at a specific level). The milestones most often cited by the community tend to sit at E1, E2, or E6 depending on the character — but none of these are required to clear the game's content. Check the Eidolon section in the table above for this character's specific milestone and gain; if sources disagree on how to rate a milestone, trust the in-game effect description over a pre-set percentage number.

How to think about SPD breakpoints

SPD (Speed) controls how often a character acts in the turn order — higher SPD means denser actions, and for some roles (especially support/healing that need to buff or heal before the team gets hit) hitting the right SPD "breakpoint" matters more than the raw SPD number. Values like 101 or 134 SPD are often cited as community-common breakpoints (letting a character act again before or after a specific point in certain team setups) — this is crowd-verified action-gauge math, not an official fixed number the game states for every situation. The right breakpoint also depends on the team and allies' SPD, so treat the SPD suggestion in the table above as a starting point to adjust from, not a mandatory target.

Where to dig deeper

This section only teaches you how to read the page — for deeper comparisons, use the dedicated tools:

  • Tier list to see where this character stands against the full roster.
  • Teams for full in-game comps with rotation order.
  • Relic score to check how your current gear scores against the benchmark.

Related Characters

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