[Taqwus]

You cast Twiceborn, and then arrange your pretender's death, after which he turns into a wight mage.

Wight mage = humanoid (usual slots), undead, landlubber, retains previous magic levels (unless feebleminded or muted in the process of dying, of course). No worries about disease spreading. Ritual of Rebirth probably doesn't work on pretenders.

I seem to recall that the Demons of HR are S&A-only, but it's been a while since I checked.

On Black Hunters and regeneration, a killed Black Hunter turns into a 55-(or so?) hp Hunter Spider. If that's still sacred, it'd be a pretty mean customer at N9 blessing.