A: Incinerate damage is based on the crawler's HP. So if you have a thf, it's best to SATA SC on the tank first off every battle for over 1k damage. Incinerate will only do 400 tops after that. Somehow fighting these, you need to do great damage right away without killing anyone from hate control ^^.
2: Dispell the damn cocoon. Some parties here makes me wonder if they've been power leveled from the dunes up to here. As a ninja tank, I'm going to craft myself 2 yoto +1 for these for bad parties.