They do some dark self-heal with the second upgrade. I agree, though, I wouldn't worry much about slotting for it when you have acc, dmg, and some end maybe to slot for.
Triumphant Defenders Forever
Psylenz FF/Psi, ArticQuark Storm/Rad, Symon BarSisyphus Bots/psn, Max VanSydow Thugs/Dk, Cyclone Symon Bots/stm, Blue Loki Ice/Cd, Widow 46526
HelinCarnate:OMG it is so terrible. I have the option to take 3 more powers but no additional slots. Boo F'ing hoo.
I'm looking through the enhancements my pets can take. I notice on zombies at least healing enhancements are an option. Is there any reason zombies would need healing enhancements? They don't seem to heal.