Hey, so I just switched to Shadow two or three weeks ago and am currently progressing on Garrosh. I feel like I should be doing more damage, especially when comparing to the other Shadow priest in my group, but I'm not sure where to start.
A few things to take into consideration is that I am doing engineer, part of the ranged group that moves out for desecrate placement and root the adds into the iron star path after our shaman's thunderstorm. All these tasks do occasionate some significant movement and I know that can drag me down a bit. Also, I received a lot of gear very quickly and ran out of valor to upgrade it all. Finally, I am aware there is some stat optimization to do, but I am looking more for gameplay improvement as that is where my inexperience with damage dealing (was a healing priest since my very first raid) shows more.