Nostalgia DS - Help Wanted

For anyone who's actually played this cheap but amusing JRPG and beaten it, you'll know that some of the bosses in this game ar $%#@ to beat, like the last boss in the Tower of the Sun. So I'm playing right now, and so far:All char lvl 49
Best equips, Eddie, Melody skill trees not yet completed
All character storylines done
Airship weapons: Maverick II default, but Pad's gun is an Armoured Turret
All Airship abilities unlocked, except for Melody's Aurora CannonLocation: Asgard
Flying over the Tower of the Sun not sure what to do.Should I train in the air or go kill the three guarding goddesses, and then face Carmine (with 6000 hp of course)? I don't want to get suicided. lol =0

you should get angel sabre for eddies weapon the airship if you havent yet. since your lvl 49 you should kill the 3 guardians , save and level up a lot in the tower of the sun.you should level up the healing skills for fiona and the defence skills for melody.you should also lvl up the co-op skills

I just kept doing their co-op moves, and see which one damages them the most.