To get the most out of the battles I give all my characters Ribbon/Economizer when you make it that high. You'll find one of the characters doesn't care for Economizer.

Offering/Gengi Glove or whatever makes the battles boring. Vanish/Doom is also cheesy unless you play the modified version. Many relics/weapons/items/ect, become obsolete at higher levels obviously.

The Marvel Shoes tend to be the constantly good relic item. I steal Thundershields from Sterodites to create 14 Genji Shields via the collessuem. You can also get Genji Armors too but only 5 people can equip w/o the merit award.

I would have loved if there were more than 5 Genji Helmets but that's what Bard's hat is for. It gives you 10 more on MagicBlk I believe.

I've done so many things with the game I hope you enjoy it for as long as you can.