I've recently finished the game with Necromancer and made appropriate tweaks in v0.7.2 (a few small ones are yet to come). I'm happy about the early, mid, and late game of the Necromancer now. Skeletons provide enough of a meatshield until the very end (while not making your character do whatever it pleases without thinking) and the new Corpse Explosion working on zombies and skeletons make them very viable for big damage (and corpse explosion has no cooldown). I don't plan any more buffs to necromancers in 1.0, other than some AI tweaks.