Necromancers can be good in parties, it's just that some people don't have fast enough computers to handle the 12 skeletons and 12 skeletal magi, a golem, all of which have BO/BC/Shout/Might/Defiance on them while the screen switches colors with every curse cast.
If everyone could handle it, though, the necromancer can be a very viable tank with skeletons. When the game starts, the teleporter goes, and the necro pops into Pindleskin's undead garden and raise a few things, maybe even a pindle run to find that elusive Unearthed Wand. :teeth: