A might be an interesting twist, but B strikes me as overkill for the nature of the game. Even if it were used just for a handful of provinces, I'm not sure it'd be worth the management time.
When a province has special troops I want, I usually build a fortress right there. That way, the province is better protected against enemy invasion, the fort draws in more resources to use right there, and (since many of the special units require a temple or lab) other buildings in the provinces aren't quite as vulnerable to assualt either.
Forts may be expensive, but I'm never adverse to having another hardened point of defense.
[ October 07, 2003, 14:05: Message edited by: Psitticine ]