Actually, "how to beat this new daily stage" is an interesting question. It's really easy because I use broken Adlay and the final boss can't even scratch me but I quickly tried other stuff and it's not as easy as it seems.
I saw a lot of Adlay from some Youtube videos of Japanese players, I guess she's just that broken, her, Corbett and Pavonia are 3 units I see a lot from them.

Guess she'll be my must have unit in the near future.

This stage is really hard I think, my Debrobium team managed to kill some mobs, but nowhere strong enough to kill the final boss, maybe it's possible if I find something really broken like broken flower memories or broken 5* units.