If you are just completing it, you can just hang out in the back and let "Manticore & Sister Psyche" defeat the villains, or if red side, "Ghost Widow & Recluse" beat up everyone.
Then if you want the officator badge, you'll need to be careful, but smack the signature chars while staying within 100' when they get defeated. It will take several runs, but the nice thing is that the ones you need to defeat are the most likely to be spawned.
Chaos, you can get the badge, but you will be knocked into the ground unless you have a decent team with you. You'll need to finish off the opposition to get the special gift (not a badge).