Don't even bother playing SP if you want to do some good DPS on most fights.
Don't bother playing SP if you're looking for a fun and engaging playstyle. It's a mindless 3/4 button spam fest whilst getting mediocre damage on most fights at best. I main holy and i like it much more if you're looking to play a priest class either way. my guild wants me to make the switch to shadow after getting the legendary belt, and i'm quite upset about that