Instructions
Attack Vapor first, as she is the easiest to defeat. Execute your thunderclap move while she is in her vapor form to damage her. Repeat this move until her health meter is drained and she will be defeated.
Avoid three of Ironclad's combos, after which he will tire out and be open to attack. Damage him by using any desired move or combo, and repeat this until he falls.
Dodge X-Ray's attacks, which consist of three laser blasts in a row, then multiple lightning strikes. Attack him with any move as soon as his radiation shield disappears. Continue damaging him this way until his health bar is emptied.
Destroy Vector's shield of rubble by attacking it until it falls apart. Attack Vector with any move, especially the thunderclap. Step away when he begins to reform the shield to avoid being damaged, then when he is finished, attack him again in the same manner. Do this until he is defeated.