However, if you actually want to make beating Emerald worth your while and reap (rape) it for his 50000 AP, you'll need all three alive, probably with triple/double growth stuff and whatnot. So, W-Summon Knights of Round is the best way to go. Use Hero Drinks to up the damage, and equip Magic Plus materia to up the damage as well. (One guy with W-Item can use two Hero Drinks on the other two people, one can W-Summon KoR, and another can Mime. Then Mime back and forth.)