Ooo, crazy idea but what if we varied it based on region type.
Rurals, mountains and Badlands would be your default with mostly weak infantry, maybe a few MI with range 1 or 2.
Woodland regions have peasants with a range of three and decent damage but crap armor. They are all set to withdraw after minimum casualties. Mess with a bunch of hunters from the back woods and you've got yourself a guerrilla resistance to contend with.
Cities and Townslands have the potential to have powerful infantry mixed in with the peasant hordes representing the body guards of wealthy merchants and lesser nobles. Perhaps this will only happen if you've been stealing tax gold.
