Is Chemistry better than just taking the highest cards?
Below roughly 90, almost certainly. The visible boost is larger than the gap between cards you would realistically choose between. At the very top it becomes a genuine trade-off.
Chemistry build
Building a Chemistry Squad
Only a few categories are deep enough to fill eleven slots. Pick one and commit.
Updated
Why this is worth doing
The developer's own Chemistry art shows Nagi Seishiro at 105 and Reo Mikage at 102 — both Manshine City, and both far above their base cards of 91 and 86. A third official image shows Oliver Aiku at 105 against a base high of 88.
A 14 to 17 point swing per card is larger than almost any single-card upgrade you would trade it for. That makes committing to one category the strongest mid-game move available.
Which categories can fill eleven slots
Most categories cannot. Of the fourteen, only four have the depth to realistically field a whole lineup, and they differ sharply in ceiling.
| Category | Cards | OVR range | Verdict |
|---|---|---|---|
| Japan U-20 Squad | 23 | 76–94 | Best target — high floor and high ceiling |
| Japan vs U-20 Match | 25 | 59–91 | Biggest, but a long low tail |
| Second Selection | 23 | 55–81 | Easy to complete, caps at 81 |
| B Munchen | 15 | 63–94 | High ceiling, expect gaps |
| Manshine City | 15 | 69–91 | The one the official art uses |
| Pros / Master Strikers | 9 | 94–102 | Too small — cannot fill a squad |
Japan U-20 Squad is the strongest target
It has 23 cards with a floor of 76 — the highest floor of any deep category — and a ceiling of 94. It also carries two goalkeepers, including Gagamaru Gin at 85, the best keeper in the game.
The one gap in the observed data is RM, though because position labels cycle, a card in the category may well cover it without having been seen to.
When to start converting
Not immediately. If your worst slot is still under 65, fix that first — rebuilding around a category while you still have very weak cards means rerolling the same slots twice.
Once your floor is respectable, stop taking off-category cards however tempting the number, and reroll toward your chosen squad.
What is still unknown
Whether the bonus scales per matching player or triggers at a threshold, whether partial chemistry pays anything, and whether position matters alongside category. None of it is published, and this guide does not pretend otherwise.
The safe assumption is that more matching players is better and a full set is best.
FAQ
Building a Chemistry Squad FAQ
Can I mix two categories?
Unknown. Official art only shows same-category pairs. Until someone measures a mixed lineup, a single category is the safe assumption.