Micromanaging armies and commanders

[Elmo]

Playing around with the demo while waiting on the post office to deliver. Not sure how much micromanaging of my armies and commanders is necessary or desirable?

First, commanders. Without specific orders they seem to cast spells until their fatigue is maxed out. That appears to cause troops under their command to rout but I may have that wrong. So I've been assigning most troops to a guy who gets an attack order and then letting other commanders cast what they will.

Second, armies. I try to group like units and give them appropriate orders and postions. Fighters in front, indirect fire behind that line, fast units on the flanks with orders to hit the rear. I'm sure there is a lot more subtlety here than I have grasped.

Anybody have some tricks they can reveal without giving away all their MP secrets? Any help for a guy just learning the game would be appreciated. Thanks.