Path of Exile: My poisonous Cyclone Shadow wasn't working as well as I wanted him to, so I decided to try a fireballin' Witch and wow, she's so much better. At level 60-something, she's firing 4 fireballs at a time with a wand that adds 1 level of penetration, and she pretty much obliterates everything. She just killed Gruthkul and Yugul and I think she didn't even take any damage. Maligaro got her twice with some kind of AoE attack that seemed to take up the entire room, but a powerful AoE that she can't get away from seems to be her only achilles heel.
I think Witches might just be overpowered, full stop. Every Witch I play seems to run circles around every melee warrior I play. Zombies are just about the ultimate defense, superior to any combination of armor, evasion, blocking and dodging that I've tried (and also superior to other minions). I found an amulet that regenerates my minions' health, and I gave the Zombies Meatshield Support and Minions Speed Support, and now the zombies essentially immortal. I haven't spent a single Passive Point on improving the zombies, and now I have four Elementals too. So with 9 minions and a big ranged attack, the Witch basically only takes damage from big AoEs, or if mobs spawn right on top of her (and in the latter case, you just use her travel power to teleport out of the way - if you're quick enough, or if you're anticipating the attack, the mobs don't even get 1 shot in).