Haha, Sanastra is very deadly. I have changed my skills a few times since my last few runs in the forums, and she has many valid points. As someone already pointed out, Magic Blast becomes fully spammable at level 81 with maximum cooldown, just like Magic Missle. And guess what else? It also outdamages Fireball when you reach 105. Plan accordingly!
Ah, AOEs. This was already covered, and the plan of attack has been laid out already. And stay away from DEX enchanters. They will NOT miss, and it's fun to watch an archer or fighter miss with their most potent attacks. I don't know what server you reside on but I'd love to tango with you!