AWKWARD ZOMBIE

My final setup was

Agnes, Time mage/Red mage, group cast all + ailment amp + bp recovery. She would either use poison poison poisona on my guys to to max out their bp with bp recovery, or buff all with protect, shell, re-raise, regen, or haste. Group cast all means I don't need to waste 4 individual turns for each buff.
Tiz, Freelancer/Salve-Maker, attack item amp, item critical, bp recovery, shield lore, def up 10%. Would use dark bane followed by mimiced shaowflares, or giant's drafts if I felt the need for double hp. Also, a bravely seconded giant's drafted dragon breath with amp and crit in bravely second is 54000, which isn't much compared to others but it's fucking awesome. I originally had dual shields on him, but then I gave him a foxtail to wiled for his speed and dropped dual shields.
Ringabel, Vampire/Time Mage, phantom weapon, two-handed, bp recovery. Vamps have rank B in axes, which was good enough to get 6100 with fireball and 9999 with spells after phantom weapon from a Giant's Axe. He was time mage because in the team-fire battle in chapter 8 I had to have him slow Qada and haste Mephilia, which group-cast Agnes could not do. At least time mage let me mix it up with 9999 meteor instead of 9999 blizaja/firaja/thundaja every turn. He also had that headgear that reduced MP cost by 25%, so he would take 2 rounds of continuous casting before he needed to MP drain. I also had him stat steal, to debuff the bosses and buff himself. Even better, since he used both m.atk and p.atk for spells, it was beneficial to steal both in more ways than just debuffing. I could have just gone pirate for debuffs but giant's drafted White Wind is essentially a megalixer without the MP. I could have gone for another class than time mage for later battles though, but it never became necessary.
Edea, Batman/Templar, bp recovery, two-hand, gloom, drain up, axe lore. I was considering Pirate/Batman, but the significant drop in armor rank bothered me. Once at 3 BP, I could rage, life or death, then rage again. Life or death activates BP recovery. I would equip a blood sword at my first brave, use it, then de-equip it on my second action so I would always have sword-magic drain. Dark bane from tiz ensured that I never hit below 8000. Though, with prate/dark knight, I could put bp limit up in place of axe lore, and do rage life or death rage rage, and also would never have to wait for my first life or death or adversity to reach 9999.

Of them all I say Tiz was most broken, because giant's draft.