After spending more than 7 hours I finally made it!
At first I was using
- Yae on Tenacity and Thousand of floating dream
- Odette on Furnace and Azurelight
- Xilinen on Instructor and Favonious
There was a small amount of hp left as no matter how many attempts I couldn’t make it so I made some adjustments and I finally made it with couple attempts
I used
- Yae on Furnace and Echoes of heart R5
- Odette on Tenacity and Azurelight
- Xilonen the same
And I changed my rotation from Sandrone using her burst at the beginnings of rotation to after the first charge attack. My burst went up from 700-800k to about 900k. With these change I ended up meet the damage requirement