Last few days I have been doing runs with LNC/MRD/PGL DDs and 0 ARCs, just for fun, killing whiskerwall 3rd. Also 1 healer. Any setup works really once everyone knows how to avoid damage

And actually LNC destroys ARC in damage potential... MRD/PGL probably do as well but its a bit too easy to miss a combo with the moogles running around/changing directions constantly