A bunch of level 70's, 25 man raid, vs. you, a level 85 Prot Warrior (In my case). You have all the talents, moves, abilities, CD's, trinkets you have now. Will you be taken down through strategy, CC, and a well planned out attack plan? Or will you conquer any guilds raid group that tries to down you for epic, fat, lootz.
Personally, If I were a raid boss, I'd have around 230k health (buffed) and with all my tank CD's and damage (can't crit the tanks though) I feel as if week after week I'd conquer any guilds proud enough to think they have the strategy to down me. Eventually though, I shall be taken down... Only a matter of time after all eh?
EDIT: I guess I should of mentioned that by being 85 you have all those talents, health pool, skills, etc. but you are only a skull to them (3 levels higher) and their hit chance is how it was normally then. Get hit cap, gg. If the tanks are uncrittable then it could possibly be healed through and or mitigated through internal/external cooldowns. Now going for the healers and clothies, that is just cheap