Cool @lithiumkat! Varia is the Bomb is a constant 25 icon weapon good for once per battle, that'll give you a NICE extra clout to your opening attack! That and Turned Tooth could do a fair bit of damage on your opening salvo! Basically, about 96-118 damage at your current strength boost! Since Turned Tooth has variable offense.
Ok, since it takes 3-4 turns for you to finish a battle, you probably should have some defensive gear on-hand. The opponents you list don't have a lot of icons in common, so "Downsize!" is definitely a defensive piece I think you should have. And yes the exclamation point is in it's name. It's always PRETTY cheap and is once per battle. Seems right now you can buy 1 from player shops at 5,000np. A little high but still not bad. I still have a Downsize! equipped in my set. lol Just in case. What other changes did you make to your equipment line-up?
Here is a list of some defensive items I compiled awhile ago for taking some bite out of weapons that deal different elements. I JUST updated the prices so these are accurate as of 8pm NST.