[Loren]

Yeah, I think nature mages would be the route to go.

Give them a preach option. It attracts 10 people per level, they come from adjoining lands. (Thus it can't be cast in the middle of a wasteland, you would have to bring people in from somewhere.) The rate would be modified by how desirable the province looked vs how desirable the place they were coming from looked. It would also be modified by the dominion--moving to a lower dominion would be undesirable, moving to a higher dominion would be desirable.