I am currently level 46 and have stacked mostly spirit on every slot with some int and stam as well. I am able to chain pull mobs with very minor downtime and almost never have to drink water
My current build allows me to Holyfire/SW:pain and then smite spam finishing off with wanding to proc spirit tap almost indefinitely.
My question is, now that I am able to respec shadow and obtain shadowform as well as many of the efficiency talents, is it more viable to level that way or just continue my spec into disc until outland/endgame???