SW: D has its uses. They are limited but I still keep it on my bar just in case. Like on twins when I'm dark essence, help build my empowering darkness faster. As posted above as well, when you are on the move it's either just run away or run away and do a bit more damage. But for the most part I find it to be just a PvP spell more then anything. It's great watching a mage going to polymorph you and SW: D out of it and they sit there and go > #@#$!.