beat on nightmare-get archer early and upgrade him, he does a loot of damage. upgrade samurais health and get defensive boosts for samurai and companions with silver. get brute when your ready and monk last. I liked daggers with dagger buff and chakra boost-daggers gain 20 chakra so you can use them always like this. Other than this, try to keep your men well rounded and focus on having the archer to most of your damage.
most fun i had in this game was making the worst burgers i could. fed up with therse absurd customers who actually tell you the ORDER they want the ingredients on the bun! who does that?!!