Yeah, I've been having a go at the arcade boss level for hours now. It feels like I'm praying for good RNG in order to win at this point. Trying to utilize all the tools they give us, but at some point it just feels unmanageable unlike the previous modes.
Edit: Finally beat it. Main tip: Use as few coin powers as possible. All I used is the corruption decrease followed by the full clear bomb midway through. The offsets of trying to manage through coin powers just isn't worth it.