Justice is a fan-made global mod.

I think the best thing to do in this situation is to increase the damage. After all, it's an attacking upgrade.

Added 10 minutes later
Volunteers
1/1, 1-1, 4, с4, i8, Living, Taxpayer
Militia
1/2, 1-2, 6, с4, i8, Living, Taxpayer, Stun
Fanatics
2/1, 1-3, 6, с4, i8, Living, Taxpayer, Assault

Guards
4/8, 2-4, 16, с4, i8, Living, Arrow Protection, Stun
Guardsmen
6/10, 3-4, 28, с4, i8, Living, Arrow Protection, Cover, Stun
Legionnaires
8/8, 2-5, 24, с4, i9, Living, Arrow Protection, Cleave