Choose Iron Man, War Machine, and Cable as your team, and make sure you choose projectile as their ability. Press L1 + R1 (default for partner A and B actions) after raising their special meter to higher than 3. The result should be all three of your team members will use their projectile super move, which will take care of the opposition provided they do not block. Note: To get an even more out of this devastating attack is to wait until your opponent uses his partner in battle, then use the attack.