There's a reason it's a Deadly stage. This stage sends out many powerful enemies, like Gato Amigo, Skelecat, Hyper Mr., and others. Pretty much the only thing this stage is missing is Dancer Cat (who you will encounter in Awakened Carnival II), but there are still enough enemies to keep you on your toes.
Strategy 1 (ft. Shadow gao)
Shadow gao seems like a cat that can dominate, rich cat to make saving up easier, if you bring sniper cat, make sure you turn it off when shadow gao is attacking, as it may disrupt his attack.
This stage is what you might have guessed, all the awakened stages combined. The bottom line: if you can beat Heavenly Tower Floor 20, you can beat this with no problem.
Line 1: Bronze Cat, Rope Jump Cat, Space Cat, Clockwork Cat, Hoop Cat (Eye Of The Storm cat combo)
Line 2: Crazed Cat, Manic Eraser Cat/Eraser Cat, A. Bahamut, an AOE attacker with more than 335 range (such as Paris Cat), The Flying Cat/Manic Flying Cat. Feel free to customize slots- for example, A. Bahamut is likely the least useful cat here.
I'm not really a professional strategy maker, but I wish you luck. Manic versions are preferred over their Crazed versions, and their Crazed versions are preferred over their normal versions.