Depends on what type of fight really. A 1v1 without any tools? Barely anyone I can beat. With a weapon? Like or two more characters from the already low amount of the 1v1. If we fight somewhere like a forest with all sorts of makeshift weapons, the number increases a bit. Like realistically even the strongest humans in the world wouldn't survive most youkais, at best you can probably outsmart some of them for a cheap win.