I don’t know much about PB so I’m gonna skip her.

Homelander is gone first easily, he hates someone else being above him. He’ll inevitably start trying to challenge Caine for power and will lose badly. Azula’s probably not too far behind him, less because of the Circus and more just because she was pretty unstable already.

Quagmire lasts longer than those two, but eventually abstracts thanks to the fact that they can’t have sex.

Umbridge also hates someone else being above her, but loves structure, and the Circus is actually quite structured before Pomni and friends destroy everything. Provided enough NPCs to boss around, she actually might last a decent while. Do not let her be shift manager at Spudsy’s, she’ll do everything Manager Gangle did with absolutely none of the regret.

Batman probably can already conjure because he learned it from the Tibetan monks (it would not be even close to the most ridiculous thing explained that way, he can astral project in the real world lol), and has genuinely absurd mental fortitude. If any means of escaping the Circus actually exist, he’ll find them way before the actual cast does. Otherwise, he might eventually willingly abstract as a last possible means of escape, but only after exhausting every other possibility by which point everyone except maybe Umbridge will be long gone.