Welcome to Gaia! ::

I play my set up as
Agnes: Ninja/Salve-maker (set up giant's draft or anything needed as in healing or anything)

Tiz: Thief/Freelance (use him to analyze to fill in entry information, also to steal items to sell, His main use for me though is to move second to Anges by using mimic

(Mimic doesnt waste your inventory) say I wanna do dragons breath which cost 2x dragon fang, if i brave mimic 4x i will be using dragon breath for free,
that's 10000pg saved now x by 4 that 40000pg saved

Ringabel: Swordmaster/Pirate yeah yeah yeah freelunch/amped strike combo
also use him on decent enemies for stat reduction with the defang, shin split, ect.

Edea: Spirit master/Red Mage my bp booster and fail-safe if needed if any of my strategy is effected i just use stillness to regroup heal up also poison doesnt effect you during stillness
(all of my team has bp recovery which recover 2 bp from status ailment which is where the bp boost comes from)
but yeah if your team dies all you gotta do is convert BP, Stillness, Convert BP, Arise(if your team is out)/or poison to get bp

its just my personal strategy would love to hear your guys'

3 Capped out Dark Knights with maximum P. Atk equipment and one Spirit Master that is faster than all the Dark Knights and has Adaptation unlocked.

Brave 4 Times on each character. (MAKE SURE THE SPIRIT MASTER IS FASTER THAN ALL DARK KNIGHTS) Have the Spirit Master use adaptation on each ally, then have all 3 black knights with the following abilities equipped, Gloom, P.Atk 10%^, P.Atk 30% up, use Dark nebula 4 times, Enjoy one shotting all but the final boss and optional boss.