Am I missing something? What are Salem's gimmicks/abilities?

I don't have the busted team everyone is using so I came up with this one. I'm badly poisoning Calem turn 1. I'm also poisoning all enemies and trapping them for some extra damage ticks. Plumeria is EX, Oak has Antitoxin and all of them has Vigilance to mitigate the damage from those sure crits. What can I change? Last time I was overlooking a gimmick check, maybe that's what's happening here.