Nowadays warlocks are some of the easiest targets for rogues(with some cooldows ready).

i know litterally nothing about warlocks cept they are too op
You know nothing about a class, but state they are overpowered? Or what do you mean? ?(

I often had the thought about a rogue team or adding some to a team. But I think especially in PVP you wouldn't be able to accomplish much. Positioning and movement are to complex. At least I would not be able to keep 3 or more chars in the back of someone running and moving around. Perhaps ShS helps a bit, but I guess I would try a combat specced team. Makes it a bit easier.

(Maybe I'm wrong and crippling poison makes it all possible.)