Looking at your stuff, I'd do something like...
Squall with AASB, 6* Spellblade ability if possible, if not 5* should suffice
Laguna with any imperil SB, Icy Offering. But avoid double cast USB, will eat through your hones (unless you find you have plenty of hones)
Noel with G+, AASB, ideally Icicle Bullet (6* Ice Sharpshooter ability), but if not Icicle Shot
Tyro with Godwall, Entrust
Rosa with USB2, Wrath
Slap Dispel on either Noel or Rosa.