I just finished a game as a Necro and really enjoyed playing it.
One thought, on the Necro Upgrade path, one of your first choices is "+1 to Tactical Regen" (I don't know the exact name).
I think you should add something like: "+1 + (1/5 * Caster level)" That way the ability will go up as your level goes up.
Also, maybe adjust that ability, or create another that also gives tactical heal to your summons.
Enjoyed the Mod!