Oh, one more feat: Fell Animate, for restocking your zombie hordes mid-fight. You have to actually kill them with the spell, but if you go heavy into metamagic reduction something like a Fell Frighten Fell Animate Kelgore's grave mist would be hilarious, locking down foes starting on the second turn with no save, and then they'd just sit there in the damaging AOE until it killed them and they rose as zombies.