Druid vs Necro - which one do you want in your group?

[Gregor]

Druid is one of the worst group classes in the game so pretty easy answer here. Necro just has to play differently in groups, aka offheal and twitch clerics and enchanters. Also half the dungeons in the game are full of undead so if the necro is good at charming he becomes better then almost everyone in those cases.

There's almost no reason to have a druid over a shaman. Same with ranger over monk or wizard over mage(assuming you have a tank). This is all assuming you have a typical group in a dungeon. This all changes in raids.