Board Thread:Questions and Answers/@comment-26481207-20150609202805/@comment-26297531-20150702022721

you should check out each unit, what is their role. a all-around team usually has the following setups: a mitigator, a healer (or pseudo healer with hc drop buff), a status curer/nuller, a spark buffer, and another type of buffer (crit, atk, def, bc/hc, bb refill, bb refill on hit), and element-adding or status-inflicting buffer (if needed). just pick units to fulfill all the 1st 4 roles at least. the remaining role to fill can depend on what friends (and thus what buffs) you have.

specialised squads will mostly consist of 2 types: max dmg type (at cost of survivability), and max def type (at cost of slower dmg output, but surviving harder fights). max dmg squads often use leads with crit dmg up or spark dmg up, with atk, crit, spark, ignore def, element change buffers. max def type often use leads with hp/def up, and a sub that can give bb refill on hit buff (since you expect to be hit, thus the max def). oguro is a new good lead for max def type, being better than orna lead. in this sense, a general squad will combine both the traits of max def and max dmg squads: having a max def lead with a max dmg lead friend (or vice versa).