Cool downs for all jutsus especially big aoe/ projectiles
Bijuudama Goukakyu and what not
Chakra drain on sharingan/rinnegan hatake and etc and what not
small chakra drain on doujutsu in general
(5-10 per second maybe?)
Major boosts unstackable with eachother
Bijuu Clad Susan'o verb for uchihas with perfect susan'o only.
Major boosts Bijuu mode, Susan'o, and etc
minor boosts sage mode, sharingan, and etc
the players will be able to only stack minor boosts with their major boosts but only one
for sage mode users cannot stack doujutsu with bijuu mode they can only have a total of 2 boosts and for uchihas they just get a semi stronger susan'o
(that is what bijuu clad susan'o is for)
2 boosts per player makes it much more balanced so that no one can abuse stacking on stacks on stacks on stacks and so on
and inuzukas are included too curse seal is a minor boost too and cannot be stacked on sage mode because literally it's senjutsu
every player is limited to 2 boosts only