Octopath CotC | Cerro the emissary EX3 5T | Ditraina & Agnea

This one took a bit of experimenting, E.atk passive management was the key to do it in this amount of turns, as you can hardly cap the active buffs and debuffs while shield shaving enough the boss, and also because going all in on Ditraina ends up in damage cap issues. However I'm so happy to conclude my first ex3 boss in less than 6T!