It's hard to do, But you just have to mainly keep your distance until they separate, then use his quick aerial (swinging arm) to damage them.
If possible, always stand in the center, so that you grab the items.
If SAsshole starts to combo, tap block to stun him and unleash your quick aerial on him. If health isn't an issue, tap strong first to go into rage mode, then stun him with block.
When you shift, getting Hank is a good thing. Just stand in the center and spam down strong.
If you get Salad Fingers, use his long range to keep them at a distance.
Other characters have good aerials to use (P-Bot & Fancy Pants). Nene, Pico, and Hominid have good fast attacks. God help you if you get Alloy or Tankman.
Take out SAsshole first. He's the worst of the group.
_________________Swinging a chain, swinging a chain...