I installed recently immersion to see how's the necromancer and I can say it is pretty awesome. But there are some noticeable visual or gameplay bugs I encountered so far (level 7).
Blood bolt seems to heal you way more than it should, or maybe I don't get the description well. But no matter how much damage I have (I have 5-11 damage), it heals me fully, from 30 hp to 120 hp. That's a bit unusual and someone can contradict me if I'm wrong.
The visual effect from confuse curse aura tends to remain after you unlearned the skills with plugy option. Need to do more research on this one.
The high summon bone terror's icon doesn't show up at the summon row, so you don't know when he dies. It is troublesome cause you don't know if it died when it got out of the screen or not.
Also, I noticed you can't summon another minions if you already have a high summon, but I guess that's an intended feature, I just need the confirmation.
Anyway, the mod is great and the skill concepts are very nice. Keep up the nice work. I feel disappointed there aren't so many people playing this mod. It frustrates me so many idiots play diablo 3 where you just endlessly grind and have no fun. I wish you more luck finding more players to report bugs and build a nice mod.
Later edit: It seems I can't ride east to act 2 with my necromancer. I can't progress any further. I don't know why this happened.