You don't track your soldier's afflictions in detail?!
You must separate the cripples out into their own squads, to prevent your lines from being messed up. That's two squads, one for cripples, one for limpers. Mutes, Chest Wound, Weakened and NHWs can be ignored and mixed in with the rest of your troops. Lost an Arm is usually okay unless it's the very first unit in an archer squad. Diseased goes straight to the front lines, as do Blind archers. If your overall morale is weak, then Battle Fright units need to be weeded out, especially for tramplers.
Who thinks it's wrong 'cos I'm splittin' and co-hittin' at. Well if you do, that's OCD and you're not down with it.