Kanrethad 475 ilvl as Destruction (Green Fire Quest)
This fight is hard, but gear is not as much of an issue than execution and awareness....and practice, lots of practice...I certainly had a lot ;)
Armory link: http://eu.battle.net/wow/en/character...
Gear is slightly better now (replaced the green legs!!!) but still awful, don't play the lock much or anything recently