Simple concept: maximum damage multipliers while using halved damage (unscathed) and 200 toughness for tankiness. If you don't let the enemies attack, you can build up so much damage. Easy to crush yokai in the depths up to floor 30, but takes a little more skill or abuse of yokai abilities/shift compared to humans. Can use any weapon and stats you like -- my stats are 150 Const, Courage, Skill (and heart, though that's less important, for more swords/odachi/bow damage), and 30 in dexterity/magic.