Hearthpwn

Well, the issue is that the ranking tells you only half the story. Yes, in theory it is a strong deck and it has a good match up versus the other T1 decks, but if you read the comments on it through the various reports, it becomes obvious that it's not an easy deck to pilot (and even their archetype distribution charts has at 1% at best).

So yeah, that is that. The basic strategy is draw your spells, wait for a pop-off turn, then make a big minion, then boon it. There is not much more to it. The issue is playing a million games to know when you can pop off, when you need to hold, when to go medium sized to stay alive.
I think in the last tournament cast there was someone playing Boon Priest.

VS244: Basically, Bless Priest is the Tier 1 deck that beats the other Tier 1 decks. The issue is that if you really want to, you can completely destroy it with oppressive counters such as Big-Spell Mage, Control Paladin, Quest/Thief Priest or Control Shaman.

VS241: Bless Priest is more of a top legend speciality compared to Naga Priest. It is a more difficult deck to pilot, so it doesn’t perform well at lower ranks. It performs better in specific match ups like Hunter and Rogue but is worse overall since it is much more vulnerable to mass removal.

VS239: Though it is a completely different deck in its play style, Bless Priest serves a very similar role to Quest Priest in countering Rogue, and therefore it performs much better at top legend (it is also quite skill intensive). This is another deck that’s very polarizing and inconsistent, but one thing it has over Quest Priest is that it is much better against Ramp Druid [...]