16-30 Dark Mode Test

Guide

If Sugar Swan's Shining Feather doesn't work, try the Blind Healer's Staff or the Gatekeeper's Horn.
I can't exactly play it myself, I haven't unlocked it yet, but this might work.

I don't think you should put Moonlight Cookie on there because, in my opinion, the main reason she's good is because of her debuffs, but they don't work on it.