>>45091657Leaf, Iris and Dawn.
Give Dawn Defense Crush 2 and have her tank. She'll also act as a pseudo-Striker (her ATK stat is actually pretty damn good for a Support).
Iris buffs her Crit and ATK and goes unga bunga.
Leaf uses her Sync to buff your team and acts as a potionslut. After the second Sync you should have enough Speed to spam Iron Tail for some extra damage.
Dawn really needs Healthy Healing though since you know who is gridlet and therefore can't heal all that much.