A user controlled 4-cass squad will have maybe a 90% win rate. Maybe 95% if geared to the max like
Soju. But my point is that if you're whale enough to get 4 Cass, then Soju's previous tank/mystic squad is still better with a higher win rate, and way cheaper (in $$$ terms) as well. it's just another squad and I don't think it's game breaking. If the majority of arena squads starts to use Cass, I would just start to use red runes of resilience.