I think someone on here was having a hard time with their priest soloing or general play tips for grouping or soloing. I would definitely recommend going to thottbot and looking at the skills available. I cant help but get psyched when I look at the spells they get. They might not be as powerful a nuker as a mage. However, Im sure Leaping will chime in and say he'd love to be able to heal himself.
Let me recount what I found interesting about the priest...
Devouring Plague - bummer you dont get it till 28 but its a big lifetap DoT. First Rank does 272 damage/healed over 24 seconds.
Feedback - weapon effect that drains mana and damages for the same amount; not till level 30 though
Holy Fire - a nuke with a small DoT
Inner Fire - lvl 12 and attack power increase and armor buff
Mana Burn - drain mana and cause half damage of amount drained; lvl 24
Renew - same power as Druid's rejuvenation but given 2 level behind the druid; I cant say enough about these spells; with this and power word shield, you should practically never have to heal
Shadow Word Pain - a nice DoT thats instacast
Shadow Guard - the Priest shadow damage version of the shamans lightning shield; Oh how I love lightning shield
Starshards - now we are talking; this must be the channeling nuke; 135 damage over 5 seconds at level 18... wow!
Power Word Shield and Power Word Fortitude - who wouldnt want a lot more hitpoints? Shield essentialy increases you hit points by X amount every 30 seconds plus it prevents you from being interupted
At level 24, Shield absorbs 234 damage. Most things hit my druid for 35-45 every 2 seconds at that level. At that level your renew is healing 35 every 3 seconds. Do the math. With power word fortitude boosting your hp by a few hundred, priests should have pretty good survivability. Your shield absorbs hits for 10+ seconds allowing you to channel 2 starshards for 270 damage. And then you can heal yourself if all goes bad.
That sounds like a pretty dam powerful class to me. I really have to stop going to thottbot. It always makes me itch for playing one of my zillion alts.
Oh and guess what? My druid cant solo as fast as my shammy. She can still solo what I would consider VERY well. Now guess what her offensive spells are? Moonfire and her staff. Thats it. I have 2 nukes I never use because one is weak and one takes forever to cast and is a mana hog. Entangling Roots? Please that spell is so weak. Ya so its a root spell. Id only ever use it in instanced to hold adds in place.