I was thinking of the same thing a few days ago, but came to the conclusion that this just wouldn't work. It would be semi-fun at first, but after about 10 min it would just be annoying. Imagine having to find equipment for 40 troops? and then when they die, having to replace it all. Not to mention the anguish if going through setup after setup equipping all that crap. Maybe if your troops had an..."equipment rating". Each stack has its own rating, say...1-100. A 1 being practically naked with a rusty kitchen knife/cracked bow, and 100 wearing the best armor and weapons that particular stack could sport. And instead of equipping everyone, you just "donate" arms to increase that rating. So if you have a group of crossbowmen, to increase that rating you give them bows/crossbows and various types of lighter armor. Likewise, with knights, you would have to donate horses/swords/lances/platemail and the like. However, still make it impossible for an archer type stack to be wearing platemail and such(i.e., donating heavy armor or 2handed axes to archers does not increase this rating). Their best equipment at rating 100 is still dependant on the class.