i have a alt spriest on pvp server. with 60-80 resilience and only 6-7k health, I can sometimes solo a full s2 not well played class.
Ofcourse I get ganked against well played charcters, but I am wearing TBC greens and have only 560 spell power ;D
Shadowpriest own. I dont think I can do that with any other class (except maybe a warlock)