So as an update on this thread, I have been using disc 90% of my leveling and like it for damage prevention. It seems though that in HoL it had a lot of problems keeping my tank up, not sure if the tank was just not geared enough or if I am doing something wrong with the priest . I have been pulling using shield and penance and then greater heal spam on the first boss but my tank went down both times and causes a wipe.