Alright so i have been currently keeping immolate up by only casting it when it is about to fall off. This forcing me to caste it during the backdraft buff. I have found it to actually be decreasing my dps. So what i wanted to bring a point to is that the back draft buff reduces you cd by 30%. My conflages and Chaos Bolts crit from 13-15k (depending on raid comp). immolate crits for what 4k at most i think, i cant remember at the moment. So why would u waste a global cooldown on a 4k hit, when you can be dropping your 13k bombs. dps is based on "damage per second" so if you caste your nasty spells faster your dps goes up. If you waste your backdraft buff on immolate arent you actually losing dps?