I don't know how crit chance works atm but Crit Teams will be viable later on cause they changed the mechanic in the DMM Version.

This Video explains it:
https://www.youtube.com/watch?v=SulFemFjMWw

Dusty Miller, Mei, Daisy, Lupine and Cactace looks like a solid Crit Team...

At the current state of the game it doesn't provide much and there are only a few Girls with the Crit Ability anyway...