[AreaOfEffect]

If memory serves me correctly, the current setup is a fix from when they use to be regular demons. The change occurred because MA Abysia had demon priests, which had the unintended and unthematic consequence of allowing them to reanimate. The demon tag has since been removed and their undead leadership requirement is now hard-coded in.

I would suggest that these units be given a new tag to indicate their status. Perhaps a half-demon tag?

Honestly, undead leadership isn't as hard to find as you might think. It is trickier to find undead leadership on units that also fly and are stealthy, which is what you need to fully realize the misbred's potential. Take a god with blood and death. Start with Revive King and move onto Bind Succubus. Vampires and Arch Devils will be optimal from there on.