Taskmaster, CrossBones, Red Skull, Black Mask. They each have two assault rifles with a five clips each, a pistol, and a sword and knife. Taskmaster has his shield as well. Deathstroke (pre-New52) has a pistol, three clips, and his sword but no armor. This is Red Skull with a cloned Rogers body.
Round 1: Random Encounter, but the skulls have been working together on other stuff for a few months. Start across the warehouse from each other. Both sides see each other.
The Black Mask pretended to hire Deathstroke to kill Red Skull. He tells him he is in a warehouse( full of crates and machinery). The team has had an hour to pick their spots and strategy in the warehouse. Deathstroke was staking it out when they entered, but Crossbones, was driving the vehicle without his mask when the doors closed. Deathstroke thinks it is just RedSkull and one ordinary flunky there. He thinks Red Skull is an ordinary human with a mask.
Darwin becomes fast enough to evade the supermen and also emits a shitload of kryptonite radiation. Wundaar extends his field to make it easier for Darwin to evade and the clones are eventually rendered helpless due to the kryptonite exposure. Butterball and Mr. Immortal (and any other blitz survivors but these two are guaranteed to live), grieving for Marvel's losses walk around and stab the clones to death with any surviving sharp objects.
Too many variables. If the clones attack people who can't be blitzed could make a difference. Whoever is standing closest to Wundaar may avoid the blitz. Does that include a telepath or reality warper?