The strongest castle in Heroes of Might and Magic IV.

If they had the same growth rate as the other castles, it would create an imbalance. Or are you saying that vampires and spitters are weak? IMO, their quantity is offset by their quality. P.S. I would even reduce the number of vampires. I read somewhere that they should have some kind of limitation, so they spend mana, or something else, because their life regeneration is very high.