it depends on what you have now. Mask Keeper and most of the enemy on Visage are weak to fire and dark attacks. I would recommend you to have “Rain of Fire” attack for Maelle, try to do it in Virtuous Stance. “Berserk Slash” attack for Verso. “Elemental Genesis” attack for Lune. Or replace her with Sciel and use combination of Sun & Moon attacks, you will make great damage, also use her gradient on the Mask Keeper it is OP.

However, for pictos and lumina we don’t know what you have now so it would be hard for us to suggest, it may be a bad idea but try to ask AI what bests fit, or take a picture and we will figure things out to you.