Ranking 5 Star viability for events and main story
Tiers:
Ave Mujica - strongest 5 star synergy
SS - top 5 star only outdone by mujicas synergy
S+ - elite of the elite
S - elite 5 stars useful in most situations
A - good operators
B - situationally good / ok ops
C - below average ops that are rarely useful
D - dont build
operators within tiers are sorted by class not strength
