NOTE: Split from topic deciding what Tanking-type partner is best to duo with a Shaman. at http://crucible.samanna.net/viewtopic.php?t=3839
I've decided to box a Necromancer with my Shaman, for two reasons:
1. Less gear dependence - with a tank (of whatever variety), I'd have to put a lot of effort into gear as well as AAs.
2. Less maintenance - most tank/healer setups have the majority of attention on the tank. I should be able to pull with Necro when needed, but otherwise just throw some dots on to speed up root-rotting.