I have been looking for a specific add on this morning and can't seem to find it. I have run a few dungeons with people and seen it in use. When a tank in particular uses a cool down it puts text above his head when it starts, and then again when it ends. I imagine this helps chain defensive cool downs together in tough situations, and lets your healer know when to expect more or less incoming damage. If anyone could give me the name of that add on, I would appreciate it very much.