Hellbind -- What am I doing wrong?

[Vynd]

If Truper is right and the AI is avoiding using blood slaves up because the enemy force is too weak, then you could try using a weaker force of your own. If you only have 1 Warlock and a few bodyguards then maybe the AI will consider the enemy commanders enough of a threat to be worth using blood slaves. Of course then there's a greater chance that you lose outright, but them's the breaks.