I think you're spending too much time looking at your skill CDs! Even before the fight started, you should've already noticed your skills and their cooldowns, the state of your healers and dps, as well as the boss/mobs in front of you. My skills are positioned in a paired method so as to allow myself to pop the most effective cooldowns as well as know what I've popped even without looking because the latest position of my fingers tells me what I've popped.