Have have decent options for a necromancy spell system?
If you have Shivering Isles, you can try out http://www.tesnexus.com/downloads/file.php?id=13927, another one can be http://www.tesnexus.com/downloads/file.php?id=13402. I tried the second and works fine, and I have the first installed (Not tried it yet, though).
http://www.tesnexus.com/downloads/file.php?id=16700
I found this mod already... Looks like it is the only slavery mod out there
I'll try it out, thanks for the link

In the meantime, nothing else out there?