sol + amaterasu.... if me, i try to keep this to a fire glass cannon team~
grab joan as soul = u get A,B,C all 3 atk down and def up skills.... u r immortal~ but... it takes time to kill things
grab andro second, put joan atk down skill on her = now u got 2 crazy healers with RESURRECTION! 3 atk down plus 2 def up skills.... it's hard to be dead unless the boss is something to do with the raging overdrive then go to 3rd souls
grab modred third, for that black propaganda + 1 overdrive charge to boss delaying it and put ur def up during that time....

also if u would like.... i can use my alt team to trade for ur account.... SSR Amon, Amaterasu, Susanoo with Echidna 45% dark+fire boost~ lvl 71 currently