Hearthpwn

 This deck has taken me from Rank 17 to Rank 8 and I'm still going strong. It competes with most meta decks and the amount of silence means you can power through taunts or buffs very easily.

Mulligan for Ancient Watcher, Silence/Purify, Northshire Cleric, Potion of Madness, Humongous Razorleaf. If you have one of your can't attacks, make sure you also have a silence in hand.

I might put in a second faceless shambler, but I only have one currently. Priest of the Feast has also helped me come back from defeat to win so I'm a little partial to having those in my deck.

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Updated this deck for the last season before Kobolds & Catacombs launches. This deck took me from rank 10 to rank 5 in a little over 4 hours of playing (across 2 days). The only bad matchups are agro decks that get an intense start, but even a turn 2 Keleseth won't always stop this deck due to the generous amount of silence as well as the inner fire/divine spirit combo. Typically you are winning between turns 6-10, after you have gotten your combo pieces. 

You rarely want to use your divine spirits for anything but a OTK. You can sometimes use your first inner fire to buff a minion to help clear things or go offensive quickly, but be careful as you might not be able to find the second. This is where shadow visions comes into play, as you can search for a silence, combo piece, or even a Circle of Healing for when you need to heal all your beefy minions.

Mulligan for PW:S, Northshire Cleric, Ancient Watcher, Radiant Elemental. If you get Ancient Watcher, I'd generally ditch your other cards and try to find your silence or purify to get him activated as soon as possible. Never keep your combo pieces, as you really want minions to play for the first several turns.

With the coin, you can sometimes be a little more generous. I've actually kept a Humongous Razorleaf as well as a silence, so that I could coin it out on turn 2, and get it attacking on turn 3.

Let me know if you have any questions in the comments below.