At least you are finding your comfort zone with this. The Necro Mage is an absolute blast to play. My first character was a Necro Mage. I retired her at level 50 something, IIRC. It has been a while. Still she retired without ever falling in battle, playing Dead is Dead. The most fun about the Necro Mage, for me, was avoiding combat. That may sound weak and boring, but it is just the opposite.
Good luck with what ever route you choose. It's all about having fun doing it.
EDit : side note on the Dead Thralls, as great as they are, there is a dangerous drawback. I like to find female Bandit Chiefs that spawn with a full set of Steel Plate armor. (AND have the female animation...no gorilla arms here...) You can upgrade their armor and give them high end weapons to use.
The downside to that is going up against other Necros. If the thrall falls in battle, the Necro will raise them AS YOUR ENEMY, with all the high end gear you made for them. NOT good!