[@Tojin] 

Stunner: I'm actually a little worried its eff is too weak, but it's your call.

Infiltrator: its effect is too strong even for an 8000 LP Duel. It's basically an 1800 LP loss every turn. Remove the 600 LP eff and change its eff to "This card can attack your opponent directly, but any battle damage inflicted using this effect is halved."

Suffocator: change its effect to "During each of your Standby Phases" instead of "During each Standby Phase".