ZZZ Drive Disc Score Explained — Rolls, Substats & What's a Good Disc | Zenless Zone Zero

In ZZZ, HoYoverse does not show any "score" for a Drive Disc. A "disc score" is a metric the community invented to quickly answer one question: is this disc worth keeping, or should I dismantle it?

The idea is simple: a strong disc has the right main stat for the Agent's role, plus the substats that Agent needs — above all CRIT Rate and CRIT DMG for DPS units. A drive disc scorer just converts how many times those stats rolled into one comparable number.

Because every Agent wants different stats, there's no "absolute" score. Use /zzz/disc-score to score a disc against the specific Agent you pick.

Each Agent wears 6 Drive Discs, each locked to a fixed slot (partition). The key point: slots 1-3 always have a fixed main stat, while slots 4-6 are yours to choose (you have to farm the one you want).

• Slot 1: fixed main stat = flat HP.
• Slot 2: fixed main stat = flat ATK.
• Slot 3: fixed main stat = flat DEF.
• Slot 4: choose from HP%, ATK%, DEF%, CRIT Rate%, CRIT DMG%, Anomaly Proficiency.
• Slot 5: choose from HP%, ATK%, DEF%, PEN%, and an elemental DMG% (Fire/Ice/Electric/Physical/Ether).
• Slot 6: choose from HP%, ATK%, DEF%, Anomaly Mastery%, Energy Regen%, Impact%.

So before talking about a "score", the disc must have the right main stat first — a Slot-4 disc that rolled HP% on a crit DPS is nearly useless no matter how nice the substats are.

An S-rank disc levels to a max of 15. Every 3 levels (levels 3, 6, 9, 12, 15) the disc gets one "enhancement": either a brand-new substat (if it started with only 3) or an upgrade to an existing one. Each such upgrade is a roll, and it always adds exactly the fixed base value of that stat — not a random high/low amount like in some other games.

Since there are exactly 5 upgrade milestones, an S-rank disc that starts with 4 substats gets 5 rolls spread across those 4 stats, so a single best-case substat tops out at 6× its base value (1 initial + all 5 rolls piled on it). If the disc started with 3 substats, one milestone is spent unlocking the 4th, so the practical ceiling is lower.

That's why "count the Crit rolls" is the most common way people grade a disc: more Crit rolls = a stronger disc.

These are the values added per roll on an S-rank disc. Multiply by 6 for a stat's theoretical ceiling:

• CRIT Rate: +2.4% / roll (max ~14.4%)
• CRIT DMG: +4.8% / roll (max ~28.8%)
• ATK%: +3% / roll
• HP%: +3% / roll
• DEF%: +4.8% / roll
• Anomaly Proficiency: +9 / roll (max 54)
• PEN (flat): +9 / roll
• Flat HP: +112 / roll
• Flat ATK: +19 / roll
• Flat DEF: +15 / roll

Note: a stat can't be both the main stat and a substat on the same disc (though HP% and flat HP count as two different stats). The percentages above are community-measured and compiled; the game shows them directly whenever you enhance a disc.

Roll-counting trick: divide a substat's displayed value by its base value to see how many times it appeared. E.g. a CRIT DMG showing 24% ÷ 4.8 = 5 instances (1 initial + 4 rolls); an ATK% showing 9% ÷ 3 = 3 instances (1 initial + 2 rolls). That's how veterans instantly read how many rolls a disc sank into the stat they care about — no tool needed.

The most common quick grade, borrowed from the wider gacha community, is CV (Crit Value), measured over the substats (main stat excluded): CV = CRIT Rate% × 2 + CRIT DMG%. Because an S-rank disc only gets 5 rolls, even if both CRIT Rate and CRIT DMG are substats and every roll piles into that pair, the substat CV on a SINGLE disc tops out at about 33.6 (each Crit roll — whether Rate or DMG — adds exactly 4.8 to CV). A valid example: a disc with a 7.2% CRIT Rate substat (1 initial + 2 rolls) and a 14.4% CRIT DMG substat (1 initial + 2 rolls) has CV = 7.2×2 + 14.4 = 28.8. Don't confuse this with Genshin's CV scale (where a single piece can top 50) — ZZZ's scale is far lower because there are fewer rolls. CV only measures the Crit portion, which fits crit DPS units but does not reflect Anomaly Agents, who want Anomaly Proficiency instead.

A good disc scorer goes beyond CV: it assigns a weight to each substat based on the Agent you pick (a crit DPS prioritizes Crit + ATK%, an Anomaly unit prioritizes AP + ATK%, and so on), then sums the weighted rolls into a percentage of the theoretical ceiling. That's exactly what /zzz/disc-score does for you — no calculator needed.

A full worked example: a Slot-4 disc with CRIT Rate as its main stat and 4 substats: CRIT DMG 14.4% · ATK% 9% · Anomaly Proficiency 18 · HP% 3%. Count the rolls: CRIT DMG 14.4 ÷ 4.8 = 3 instances (1 initial + 2 rolls), ATK% 9 ÷ 3 = 3 instances (2 rolls), AP 18 ÷ 9 = 2 instances (1 roll), HP% 3 ÷ 3 = 1 instance (0 rolls) — exactly 5 rolls total. For a crit DPS: a correct Slot-4 CRIT Rate main plus 2 CRIT DMG rolls and 2 ATK% rolls makes this well worth keeping, with just 1 roll leaking into AP. That's the exact logic /zzz/disc-score runs automatically once you pick the Agent.

Putting it together, a Drive Disc worth keeping for a crit DPS usually has:

• The right main stat for the slot: slot 4 = CRIT Rate/CRIT DMG, slot 5 = elemental DMG% (or ATK%), slot 6 = ATK%. Wrong main stat = trash it, no need to check substats.
• A 4-substat start (not 3): no milestone wasted unlocking the 4th, so higher ceiling.
• At least 2 rolls into the Crit pair (CRIT Rate/CRIT DMG) on the key slots, or stacked into ATK%.

For other roles, what counts as "good" shifts to that role's core stat:

• Anomaly Agents: prioritize rolls into Anomaly Proficiency and ATK%; Slot 4 should roll AP, and Crit is largely ignored.
• Stun units: aim for Impact% on Slot 6 plus ATK% rolls to build daze faster; Crit matters little.
• Supports: if the kit needs energy, Energy Regen% on Slot 6 is the core main stat, with substats going to whatever stat that Agent's skills scale from (often ATK% or a flat stat tied to their set).

Practical tip: don't dismantle a fresh level-0 disc immediately. Level it to 9 and watch the roll direction — if the first 3 milestones dodge Crit while you need Crit, that disc usually isn't worth farming further. Since patch 2.5 the game has a Substat Tuning feature that lets you swap one substat using materials, so a disc with a perfect main stat but one off substat can still be saved. Paste a disc into /zzz/disc-score to instantly see keep-or-scrap; check a real Agent's stats via /zzz/uid.