1. if your gona play a priest eather go disc or holy, if u go shadow ur basicly fucking up every dungen u get invited to.
2. if u want to take it easy go full holy and run dungens to level up.
3. if u want to take it hard go full disc with a little bit of holy for PvE.
4.Shadow fucks up every grp looking for a healer, you wouldent belive how fucking hard it is to get a healing priest around level 60-70.