So helpful thank you, if someone using beryl and innana like me instead of lightning you can use a beryl meteor there in 6:22 and advance her turn to blow all the purple zone is oneshot for everyone except the boss
I've done it with Beryl, Maitha, Gloria, Abyss and Nightingale. Nightingale Piercing damage is, let's put it, overpowered against bosses. My strat was to put them to sleep while burning them with wall of flame and pushing the ones i could with Maitha and Gloria.
Copy your strat, done with 11 rounds because i am lvl 36, i think thats the reason i cleared it much faster for some reason my balista and gloria is dealing some dmg, they easily break his shield. Thanks with the guide.
I found this easier than 5-5, I pushed almost all of the enemies to death, and then initial barrel burns teadon for a lot, I did use rayiah for push too