Hi there,
I think the incarnate, artillery plant, bone widow, etc..
Are too physically big, I found it to be overkill for the balance of screen use and made me really regret making a summoner/necro.. I think the summons should be half the size.
The first necromancy summon was also disappointing, I really disliked bloated corpse... I think everyone expects to be able to summon a skeleton or a zombie as the first, but I haven't been able to do this at all.