In Shogun warlord edition build a legendary sword dojo and legendary palace, Amoury, Sword Smith and a drill dojo. With the Sword Dojo Train Kensai. They almost invincible warriors. There is only one to a unit. Put them in a army by themselves. It will take a long time but it is worth it. Once you have a army of them use them for battle. You must control them yourselves until the general have some honor. All you need to do is just charge the enemy and they will do the rest. After the general has honor you can automatically resolve the conflict. 16 of the kensai can take on 2000 troops on their own and suffer no casualties.
Submitted by Jesse Otnorot