Magus and Sephiroth, Magus has his dark matter spell, thats gonna rip apart Kefka, Sephiroth Could take Lavos out, Sephiroth has got some serious mojo of his own, he did also have time powers to neutralise Kefka, and you saw in advent children the guy doesn't ever get tired and can keep anyone on the tip of his very long sword, so then Maus would join in and take out Lavos