The Llodos plague is a damn complex concoction. I'm not sure I have the skill and experience to totally counteract its properties, but I have an idea for how to suppress and slow the pace of the disease. It will require a number of rare and exotic ingredients to pull this off, though. An alchemical concoction such as I'm imagining doesn't like to be subjected to high heat. It's too volatile. It needs to be allowed to seep and brew. Therefore, an adjustment of one-quarter flame should suffice to get the mortar to the proper temperature.