If everyone is on the same page and some simple things are called out the fight is a cake walk, if not you are going to get your nose rubbed in it a couple times until your raiders learn better.
Fire, Ice, Arcane. 3 things. Fire don't move at all, Ice move in a circle and avoid the giant huge unmissable AOE, Arcane run the hell out. Seems pretty simple, eh? DPS him before he sheeps and AOE's you. Fear, banish, deal with the elementals when they pop the best way you can see fit and just kill him dead.
Simple kick rotation and there you go.
____________________________
Bode - 100 Holy Paladin - Lightbringer