In your opinion what was the most broken OP class you have ever played or heard of? I'm asking because some guy is claiming Rifts pyro is the clear choice and I don't agree. I remember some times in WoW with some ridiculous stuff but I'm having trouble recalling. I believe there was a class in Conan (or War?) that oneshot people with no charge up.

Anyways Pyros can currently one shot people IF they have 100 energy and have a certain buff, but they must recharge energy to do it again, which takes time. They are being nerfed so it's moot, but Im curious what has been the most OP.