Arcane mage, don't run just pop all CDs nuke him till first adds, then arcane explosion them down and go back to nuking rinse and repeat using a damage reduction like temporal shilled, and have your counter spell ready.
I haven't had a problem at all.. I just nuke, kite when have to, stand out of shit.. interupt.. You know.. the basics.
Don't be "pro" and just lust and all cd's at the start, and hope you can nuke before the buffs drop.
A tip for anyone doing the rares, for the defence system. Get a priest to levitate you, and you won't have to jump over the lasers. Easiest rare by miles lol.
I'm still stuck on Battletron ><