Originally Posted by
Del Murder ^ Well it does take some skill to choose the right rage and dance for the final battle.
I wouldn't really call it skill. It's more of a necessity to pick Wind Rhapsody or Snowman Jazz for their healing abilities or some rage that restores health (rarely used Gau) otherwise as soon as Fallen One/Heartless Angel hits, you're pretty much screwed. And even with picking either of those dances, it's still a random chance that you will the correct dance at the correct time and it will heal enough so you can survive his other attacks.
Of course, I guess if you outfit your characters correctly and increase their stats to the maximum allowed or possible, you stand a pretty good chance at level 99. I'd still say the chances of success are more based in luck than skill though.