Quote Originally Posted by Kawaii Ryűkishi View Post
  • Cast Shell to lower the magical damage caused by Blizzara and Blizzaga.
  • If you're going to use Quickenings, shoot for a chain of at least fifteen or so.
  • If you haven't already, set up your characters with a Gambit along the lines of Ally:status=KO >> Phoenix Down. Or Raise, if you can afford to spend the MP.
  • Level up a bit.
  • Realize that there are Marks in this game that are dozens of times more trouble than this one.
This is a good strategy. Also, if you're going to use Quickenings like I did (I was at level 30), make sure everyone has the "Charge" Technick so that you can get your MP up after using the Quickenings.

EDIT: Also, after I had used a chain of Quickenings, I charged Penelo and had her cast Immobilize. This magick works on the Gil Snapper. Equip everyone with long range weapons or have them use magicks and you're good to go (aside from Gil Snapper's ice-element magicks)