Advanced Gakumas Memory Selection (厳選): Score by Weight, Not by Guesswork
The Gakumas Memory guide already covers what a memory is and the basic selection principle. This one goes deeper: using the actual first-party WEIGHTS that the Memory Compare tool and Contest Simulator run on, turning "memory selection" from a gut call into a grounded score. Three weight groups worth remembering: (1) Vocal/Dance/Visual stats are multiplied ×3, stamina ×24, and each customization slot ×36 when computing contest power; (2) the skill cards/P-items riding on a memory carry different strength depending on source (pIdol > support > produce), rarity (SSR > SR), and upgrade status; (3) for produce (unlike contest), the priority is a memory that carries the exact card you need to reuse, not raw contest power. As for 合成 (memory synthesis), no first-party source describes its formula yet, so the closing section stays general and gives no numbers.
The three weights behind a memory's contest power
The contest power formula (used by both the Contest Simulator and the Memory Compare tool) sums up from:
- Stats — every point of Vocal, Dance, Visual on the memory is multiplied ×3.
- Stamina — every point of stamina is multiplied ×24, the highest of the three multipliers, because the stamina scale is much smaller (roughly 200 max versus 3,000 per stat).
- Customization — every customization slot is multiplied ×36, the highest multiplier overall.
Because these three multipliers apply to three different value ranges, "higher multiplier = more important" is the wrong read — you have to multiply the coefficient by the realistic value range to see which part actually contributes more. That's exactly what the Memory Compare tool does for you once you plug in a real memory's numbers.
The power of a memory's cards/P-items: source, rarity, upgrade
Beyond stats/stamina/customization, most of a good memory's contest power comes from the skill cards and P-items it carries. Three axes decide a card's strength, in order of impact:
- Source (sourceType) — a P-idol's signature P-item/card (pIdol) is strongest, support cards next, and cards picked up during a produce run (produce) weakest. The gap is stark: an upgraded SSR pIdol P-item contributes roughly 420 power points, while a non-upgraded SR produce card sits around only 75–96.
- Rarity — SSR always beats SR at the same source (e.g. an SSR support P-item is roughly 180 versus 135 for SR).
- Upgrade (+) — same source, same rarity, the upgraded version always edges out the base.
The practical takeaway: when deciding which slot to keep on a memory, prioritize in that exact order — a single signature SSR P-item is worth more raw contest power than several produce cards combined.
Contest and produce want different things — don't use one ruler for both
The weights in the two sections above compute contest power — the right measure when you're building a contest lineup. But when carrying a memory into a new produce run, the goal is different: you don't need the memory with the "highest contest score," you need the memory that carries the exact skill card you'll reuse. A memory with mid-tier contest power but the right core card for your current plan is still more useful than a memory with top contest power but cards that don't match your plan at all.
How to apply this: decide upfront what you're selecting the memory for (a contest lineup or an upcoming produce run) before you score it — using the wrong ruler means keeping the wrong memory. If a memory scores well on both fronts at once (strong contest power AND the right produce card), that's a keeper worth holding onto long-term; if it only wins on one front, weigh it against whichever goal is more urgent right now.
A Legend card on a memory: a special priority
If a memory is carrying a Legend card, bump its priority up a full tier. Reason: all 23 Legend cards only come from playing produce (none are pullable from gacha), so if you delete the one memory holding a specific Legend card, the only way to get it back is producing all over again until it shows up once more — far costlier than "missing a regular SSR" (which usually has other memories or sources as backup).
Applying this to scoring: when two memories are roughly equal on other criteria, the one carrying a Legend card should win, even if that card isn't something you need for your very next run.
On 合成 memory synthesis: what can and can't be said
The game has a 合成 feature for merging/processing old memories. GameVika does not yet have first-party sourcing (community simulation engine or game documentation) describing the full formula, rates, or limits of 合成, so this section stays general and gives no numbers at all — avoiding the exact "guesswork" this whole guide is built to steer away from.
A safe principle to apply when considering 合成 (works without needing any numbers): process memories in the reverse order of the scoring criteria above — a memory with no rare card (no Legend, no high-rarity pIdol/support), no standout stats/stamina/customization, and not the sole copy still holding a card you need, is the most reasonable candidate to process first. Conversely, don't touch the one memory still holding a Legend card or a rare P-idol signature card.
Related tools
Frequently asked questions
What are the ×3/×24/×36 weights for?
They compute a memory's CONTEST POWER (stats ×3, stamina ×24, each customization slot ×36) — used when building a contest lineup, not when picking a memory for a produce run.
Is a memory with a pIdol card always stronger than one with a produce card?
For raw contest power, yes — the source order is pIdol > support > produce. But when carrying a memory into produce, what matters is "the exact card you'll reuse," so a memory with the right produce-sourced card can still be more useful for your next run despite a lower contest score.
Why doesn't this guide give numbers for 合成?
Because GameVika hasn't found a first-party source that fully describes the 合成 formula/rates. We only publish numbers we can verify — we won't guess just to make the article look more "complete."
Which memories should I never process/合成?
The sole remaining memory holding a Legend card or a rare P-idol signature card — both only come from playing produce, and losing them means starting over from scratch.