Wah wah my CRP can't do this dungeon either! I'd better level a mage or ARC. Oh wait... There will always be optimal setups. If you're good you'll be able to do it with less than optimal. The dungeon is rather easy once you have experience. Especially when you reach the point where you have enough spare time that if you do wipe on Batraal's last phase you can run back to kill him from 100% with no skeletons.