If you're having trouble against Carbuncles, I imagine you'd have no less trouble with files like Guardian, Sea Serpents, and EX Lap.
Carbuncles are in many ways more vulnerable than those files, considering how weak they become once their vulnerable supports get taken out. Or once you manage to take out the 3rd copy of anything.
Also, you guys are really overrating Amethyst Eater by a ton. She's possibly the most useless member of the file. Against any competent file, you'll be stuck doing 10 dmg with that actionskill every turn. I personally knocked her down to a single copy in my build.


