I think it is just better to make all archers do that instead of just militia units but assign the ratio 3 ways - units closeby, units farther away, and the ground(missed arrows). Depending on training, maybe adjust the ratio so there are less ratio leaning toward missed. I'd just slash militia unit's morale(cap at 50 and set to police) and CS in general. Maybe upon becoming militia units they lose 50% of their stats or something while pay is doubled.
