Im playing for long time, but this is my first post. I love Kenshi!
I think, there should be option to attack your own teamnate. If you hold RMB on your char, you should click "Attack target" as you do with enemy, so they start to fight themselves.
Main reason is getting skill, and there should be some training swords (for example bokken*, dealing just "shadow" damage, not killing
For not getting skills quick without danger, there should be simple rule - skill is rising just for char with lower stat, and maximum, which he can get is for example "stat of higher one" - 20.
So if are fighting one with 30 attack and one with 5, max he can get is 10.
There should be skill teaching or training, which decrease this limit.
I think this isnt so hard for coding, at least first part
*wooden katana used for training.