Actually, reverse aereal warlock punch has far more knockback than stage 8 eruption. It's knockback is just horizontal though, not vertical. If you placed bower near the end of the stage, it would k.o him at 0 percent. If you want to talk about efficiency over placement though, Ganon's Dair can also k.o at 0 percent, if you are over the edge of the stage.
@SuperDarkness123456 uh...yeah...if he did it after the falcon punch would have surly hit him...do it before and it'll work...unless the world is reversed to me...?