Cat Nip doesn't seem to work for me. With level 76, 75, and 86 characters, and even with 9999 HP, Heaven's Cataract takes down all three of my characters in a single hit and it seems that I only have enough time for one Trigger Happy before Chac casts it. Of course, I've also tried using Auto-Life but it's difficult to get it on the characters before he decides to wipe out the group... And even if I do, I'm so busy reviving that I don't have time to use Gunner's attack. I tried the battle about thirty times in a row using various attack methods with no luck after which I called it quits, heh.