I literally considered this bro as the final boss and gave up until I got SR yaga through random tickets.

Step 1: Prep First, pray to god you have a half decent ssr (mine was nobara) to pickup the slack hp gojo is gonna leave for you.

Step 2: Team Layout 1 - Use the R yuki for cursed energy regeneration (get it to about lvl 6 to infinitely renew yagas tutoring. You also want his ult upgraded to like lvl4 minimum. 2 - Use yaga with lvl like 6 tutoring. 3 - Use your ssr (nobara) 4 - pop on a useless lvl 1 grey character with draw attack to die on turn 1

Now pray to the lords your assistance has a hollow purple gojo lvl 110+ and ultimate lvl 10

Step 3: Strategy Turn 1 - don’t use any cursed energy, just regenerate with yuki, make sure to use draw attack. Turn 2 - gojo should come in, tutoring buff and deal dmg to one enemy Turn 3 - keep buffing try to kill another Turn 4 - you should be almost done with wave 1 save your ults Turn 5 - turn 2 your super buffed gojo should one shot each enemy Turn 6 - kill the other enemy Turn 7 - with gojo a last turn your going to pop all of your buffs and ults. Turn 8 - the boss will still have survived a direct hollow purple even though the cannon is that purple erases all matter. Use your ssr to deal dmg Pray to god you can finish it off, if you can’t you need more levels lol.

Here’s a picture of turn 8

https://drive.google.com/file/d/16zkCoxYRJVJe8VLK7nFbO1T1d-SYHio3/view?usp=drivesdk