Lore accurate teams should have some sort of bonus.

For example, Aizen, Gin and Tousen should allow both Aizen and Tousen to use theirs battlefield skills. Soi Fong Should gain an extra attack buff of paired with Urahara and Yoroichi, like a jealousy bonus would be fun. Cannot think on more trios from the top of my head because Bleach characters generally have interaction duos.