Ideas to stop mass castle building for DOM_3

[quantum_mechani]

I don't think the cheap castles are overpowered so much as the more expensive ones underpowered. I think a good solution would be to give special bonus to each of the less used castles. Dark Citadel could spawn skeletons, normal Citadel could recruit two commanders per turn, Fortified City could draw population from other provinces, ect..