Your equipment is looking great for a number of reasons
1) its obvious for Vaan that he's the damage dealer with gear such as masamune and genji gloves, my bash has masamune w/ genji gloves and is constantly bubbled/decoyed/beserked, his dmg is over 4500! i want to imagine how much it would deal after i give him the Zodiac spear =\ it's also obvious that Vaan can take the damage with the heave gear you got going.
Basch is the obvious tank but with the crysstal shield he's not going to evade that much with that shield however can i recommend you to get the kaiser/aeigis/Ensanguined Shield/demon or zodiac Escutcheon (esp Ensanguined Shield) you can evade hell good! esp if you have the main gauche dagger.
Fran is a greatcaster with the gear you got going (it's called the sage's ring =P) the sage's ring really cuts the mp cost esp if you have the chanelling licences! the bow you got is also good but u should try stick mainly to casting since i personally see no point of using a ranged weopon in boss fights or any fight if you cant use the Ensanguined Shield which gives a whopping 90 evade! FTW! Your gonna get killed anyway in boss fights so why not deal more damage =\? The only exception i see for this is if your intentionally trying to inflict a status effect w/o using spells since they take a fair amount of time. You also have the sage's ring so your mp cost of spells is gonna be low and fran naturally has high mp, so no need of worrying about low mp exept for when fighting bosses with the magick field (e.g rufflesia, ultima)just get your quickening to lv3 and its ok. also have a gambit for fran; Fran<10%MP (>) Charge, that gambit never misses!
For Ashe i think it's really smart having a backup, that would really help a fight if someone has fallen esp tank, you should however give her a better sword and the Ensanguined Shield since basch will fall first since u said he's the tank. Remember you can equip shields to anyone anytime you want.
Overall, you really dont need this setup if your just going to do the main story line, the last boss, the undying, is just lv 50+ and since your already past lv 60
i would imagine you would really ®wn the main bosses in the main storylineAlright I'm level 60ish and about to go to Pharos I believe.
I hope you took this critism's/comments in a good way





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