I've noticed an issue with the destro warlocks where the script prioritizes Life Tap over dps related spells. It's a loss of dps to be casting Life Tap at 90%+ mana. Lately, I maybe finish two spells before instructed to use Life Tap. Otherwise, with demo warlocks, Life Tap isn't instructed until mana is at 25% or less. Which makes way more sense for the class rotation and dps output.