HELP PLEASE [spoilers]

[Blank]

DS version

i can't take it anymore. I can't beat it... i want all the advice and criticism you can dish out, i want to get it over with already.

here's my specs, rip them apart if they suck, correct me!!
all 4 are level 57

here's my first try at beating the game:
luneth - black belt
arc - dragoon
refia - devout
ingus - knight

and here's my second try:
luneth - geomancer
arc - magus
refia - sage
ingus - knight

im begging you, everybody, what'd you do when you beat it???