How do I beat Trema? I got the gunner=catnip/speedbracer thing going on, and two mascots with around 11k HP break. I double the hp of the mascots with items in battle, protect, shell, haste, and use xpotions to heal. I still can't beat this guy.

I can get around 18-20 triggerhappy shots in, but he'll always ultima/meteor my entire party to death.