That's a lot more barrels than I used on my attempt pre-patch5 ahahahah, I threw barrels of oil covering the whole field and set it ablaze after starting the fight. This is much more effective, but the time required for it is not something I'd dare to put in. XD
The funny thing is that Barrelmancy or using barrels actually makes sense for this fight because the Tieflings were the ones to set it up originally so you are just adding to their defenses.
