[Illuminated One]

Well, I'd even go so far to build a temple in every castle, but that's still maybe 15 temples against 20 temples +20 bloodsacs. So your dominion can certainly be pushed back (while I still think that a real domkill is impossible since you have a big bunch of free h3 priests - if you are desperate put 10 into your cap and set them to preach - noone can force that much enemy dominion on it).