Hearthpwn

Priest - Hunter - Rogue

1. Mass Dispel - Twilight Drake - Murloc Tidecaller
2 Holy Nova - Thoughtsteal - Dragonling Mechanic
3 Booty Bay Bodyguard - Amani Berserker - Mind Control
4 Dark Iron Dwarf - Stormwind Champion - Inner Fire
5 Holy Fire - Ancient Watcher - Wild Pyromancer
6 Circle of Healing - Stormpike Commando - Youthful Brewmaster
7 Amani Berserker - Loot Hoarder - Stormwind Champion
8 Darkscale Healer - Mind Vision - Elven Archer
9 Bluegill Warrior - Cult Master - Ogre Magi
10 Imp Master- Auchenai Soulpriest - Ancient Watcher
11 Core Hound - Dalaran Mage - Venture Co Mercenary
12 Silberback Patriarch - Young Dragonhawk - Stormwind Champoin
13 Leper Gnome - Argent Squire - Shieldbearer
14 Frostwolf Warlord - Ironfur Grizzly - Spiteful Smith
15 Tauren Warrior - Frostwolf Warlord - Faerie Dragon
16 Gurubashi Berserker - Dread Corsair - Booty Bay Bodyguard
17 Earthen Ring Farseer - Amani Berserker - Circle of Healing
18 abusive sgt - lightspawn - youthful brewmaster
19 tauren warrior - amani berserker - thoughtsteal
20 questing adventurer - emperor cobra - lightwell
21 booty bay bodyguard - thrallmar farseer - temple enforrcer
22 shieldbearer - argent squire - archmage
23 priestess of elune - mad bomber - harvest golem
24stormwind knight - earthen ring farseer - harvest golem
25 mind control tech - demolisher - stampeding kodo
26 southsea deckhand - elven archer - chillwind yeti
27 ironfur grizzly - ironforge rifleman - spiteful smith
28 raging worgen - flesheating ghoul - youthfewl brouemaster
29 knife juggler - lightwell - auchenai soulpriest
30 mindgames - cabal shadow priest - sea giant

Im not a huge fan of soul priest honestly, it hurts you in a lot of situations.

I personally love lightwells, they are great for healing and are so buffable in a priest deck.

need to keep your curve lower. 3/2 minions for 2 are very good as they trade off against opposing 3 drops almost all the time. I always want 5-6 of those in my decks, so I take those aggressively. Especially in priest decks and even more so if you get a MC early, you want to keep your curve extra low as you got a decent chance to get another MC and don't want too many 6+ drops in your deck then.
also with the priest racial not doing anything on turn 2, having a good curve is even more important. as paladin, rogue, mage, druid, shaman it's less so, but as priest/warlock/warrior you really want to have a 2 drop.

4. dark iron dwarf
5. wild pyromancer, need those early drops
6. youthful brewmaster. see above.
11 venture co mercenary. mage is just not good as a 1/4. was awesome with 2 power, but now not good enough if you aren't super spell heavy. which you generally are not in arena.
13 leper gnome. 1 power just doesn't do much. leper gnome isn't great either, especially if you are a slow/controlling deck (which you are at this point), but still better then argent squire.
14 grizzly. i like warlord a lot, but at this point you got MC, holy nova, stormpike commando, holy fire, darkscale healer, stormwind champion, you really need to lower your curve. i might take warlord there with my focus on 2 drops earlier. but you have to take grizzly here.
15 faerie dragon. see my explanation at the start.
19 amani besreker. thoughtsteal is not a great card.
20 emperor cobra. holy cow, man. lightwell is barely ok, can be actually good with divine spirit, that power = health card is called. although you do not want divine spirit in your deck, but if you happen to have it, lightwell goes up in value. still not a good card to start with ... cobra is very good and even more so in a priest deck. if you get a pwd shield, that thing can win games on its own.
22 archmage. argent squire, again, barely playable.
23 mad bomber. hate the effect, screws myself too often. but 3/2 for 2. can't pass that up for something so expensive at this point with your curve being bad.
25 i like kodo better then demolisher, but it's pretty close.
28 brewmaster for me. more 2 drops.
29 soulpriest
30 sea giant. great card.

too many 1/1s for 1 and not enough 2 drops, that seems to be the problem to me.