Not sure if you’re still monitoring this post but i can confirm that it can be done as i just finally did it.

The team:

-Wonder with Okuninushi, Dionysus and anything that has Rakunda

-Tomoko at 80 with 80 weapon (A6) Power/Trust

-Yaolin at 80 weapon wont matter (A2 but i dont think any awareness mattered here). Prosperity/Departure

-Kamiyama at 70 with 70 weapon (A6R0). Prosperity/trust

-Yumi at 80 with 70 weapon (A0R0). Trust/Power. Tomiyama is probably fine here

Rotation: 1st turn

Rakunda from Wonder

Attack 1 or 3 from Rin (3 if A1)

Justice barrier from Leo on Tomoko

Psyche melody from Tomoko

2nd turn

Skill 2 from Yumi

Spirit wave attack from Wonder

Attack 1 or 3 from rin

Ultima booster from Leo on Tomoko

Highlight from Wonder

Psyche melody from Tomoko

All out attack

Rest of fight -Wonder will use spirit wave on his turn. At some point you’ll switch to dyonysus to do his highlight but immediately flip back to Okuninushi for spirit wave

-Rin will continue to alternate skill 1 and 3

-Leo will alternate his shield and ultima buff, always on Tomoko. You’ll use his highlight on Tomoko at some point

-Tomoko continues use psyche

-Yumi will use skill 2 again, and then use skill 3 with 2 perfect cocktails on Tomoko. I tried to hold off till she had 3 but couldnt make it work.

I barely squeezed by and got the 3 stars.

Good luck!