You definitely want to steer clear of the necromancer specialization. The passives for extra dmg and health/mana upon kill are nice, but little else is worth your skill points. Zombies from spirit mark are buggy, and you can select to kill them (WHY!?!). Let's talk about the REAL problem:
Simulacrum (it's a passive). If you're a mage with half a brain, then you'll want to get Guardian Spirit. It gives you a sweet barrier at 1 health, when you're about to die. You pop a potion, and then your back on your way to kicking butt and taking rifts. Here's where Simulacrum is a poopy bad thing (thanks Egoraptor). When you get to 1 health with Simulacrum, you pop a barrier thanks to Guardian Spirit, but then you DIE. The passive, Simulacrum, actually KILLS YOU AT 1 HEALTH.
You can't even get Living Bomb without suffering the woes of this crappy passive because Simulacrum is a necessary skill to acquire Living Bomb. I don't even know if living bomb has any bugs because it isn't worth giving up the utility of guardian spirit for the self-harming ability simulacrum. Here's an example:
Blinding Terror (s'okay passive)
- 15% dmg to panic targets (neat with fire spec)
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God Awful Simulacrum
- kills you at 1 health, even with Guardian Spirit
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Living Bomb
- who knows or cares because you just picked up the worst passive in DAI
I've actually had instances where if I killed someone with the passive active, when the timer ran out I'd die, and after a second or two, I'd return to life. I control my companions so they cannot resurrect - - so it might be something unmentioned, but it's happened to me pretty consistently.
