Hearthpwn

I'm a F2P player wanting to try some priest deck (pretty new player at that). I did already tinker with some of the cards but wanted to hear your opinion before dusting other cards and buying the wrong ones. A few considerations which run into this deck:

- Try to focus on heal and use its effects with Northshire Cleric, Light warden & Shadowboxer

- Pump Lightspawn with health boosts and try to convert others into Lifespawns with Inner fire.

- Due to the low mana curve I might run into card draw problems, are there better possibilities than Acolyte of Pain?

- I have zero taunt minions, is this an issue?

- I do not play mind blast, because I couldn't find a spot for it. Should I cut something else, if yes what?

- I basically have very limited abilities to deal with big dudes, is this a problem?

As you might have guessed this is my first serious attempt on a deck, so I'm sure there is much to be optimized.