Okay, I inputted and tested your changes, and they worked for me.

I started out with 60 h2 archers vs. 360 h2 Naginata Infantry, on Totomi. On the second try, I, playing the archers, defeated the enemy, with 251 kills and 2 casualties due to friendly-fire.

Are you sure power and accuracy are the ONLY changes you made? Cuz it is now shown to be highly unlikely that that's what is giving you trouble.

Matt