Kefka started as a human but turned into so much more. Ya once again Phantom Esper is your best friend if you are on the floating continent. Locke can also steal Genji Gloves up there as well off dragons. It's a 1/16 chance at grabbing one. The only thing that will mess you up bad up there is Ninja's. Have a few spells ready for them. Also they will take away your phantom invisablity. If you took Strago up you can learn his 1000 needle Lore up there too which is a easy 1000 damage also.