You just beat it. HAHA. JK. OK you get a Gun Mage. Make sure it knows scan, and check out the Yojimbo's weakness. Carry 1 Gun Mage, and 2 Warriors. You'll beat it in no time. Unless, you're freekin'...
They have all sorts of cheats that you can look up online. But the easist and most basic way I know is to have one of your characters be a songstress doing a dance of silence since she mostly does...