Red/Black/Black, with Bray Wyatt and Rusev. Straightforward. Thanks to Bray Wyatt's training ability, you'll rapidly get Big Cass' black moves and frequently win on turn two or three.
Black/Black/Purple, with Xavier Woods and Rusev. Although slower and less reliable than the moveset above, this moveset is also quite powerful. Target purple gems until you trigger your Jumping High Knee, then use your Big Boot to finish your opponent.