So we reduce downtime to fill the gap of their personal emnity control. If you have a competent tank you never lose aggro. I use Shadewalker on beggining of fights and then maybe if i have cd's and we go into a burst phase. it converts ONE tank combo from a threat combo to a dps combo and all in all adds like 1000 damage NOT DPS damage to our group which is about 2.77 dps over 6 minutes. Its great really i dont think we would meet dps checks without my new emnity moves.