You should not be able to shoot a self Rez as soon as he gets up, I think he should be immune till he moves, like invisibility as soon as you move you lose you invisibility (By move I mean shoot or throw a grenade or malee) as soon as he does those or walks,slides,ducks, or runs he can be one shot with a sniper.
I made this post as a joke and should not be taken seriously. Thanks for the awesome comments this subclass does not need a buff in anyway shape or form. This was a joke post to see the results.
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Gonna guess, hardcore warlock main by miles, not even gonna check.