Hearthpwn

Well, that's literally one of the best pallys i tried this season. 
I played only 70 games (with 70% winrate btw) from rank 5 to legend! 

MULLIGAN:

VS AGGRO:

Every 2nd drop, except of Bloodmage Thalnos, Call to Arms,
MAYBE Consecration.

VS CONTROL:

Againly every 2nd drop, except of Bloodmage Thalnos, Call to Arms,
MAYBE Spellbreaker.

GENERAL GAMEPLAY:

1st - you need to know - turn 1 you mostly would just play your hero ability. Exceptions - trade with 1\1 or 2\1 with Vicious Scalehide or play Knife Juggler on the empty board.
2nd - if you have empty board for more than 1 turn you will lose. 
3rd - VS Aggro ALWAYS trade, you can go face only if board is cleared, you have lethal or your board is undestroyable. 
4rd - ALWAYS think before playing minions when you have Dire Wolf Alpha.
The best board with Wolf will look like that:
Minion which u dont want to trade - Wolf - Minion you want to trade.

VS CLASSES/TIER 1-2 DECKS:

Warrior:
Gameplay against Quest\Non-Quest Warrior isn't different, you need to have some "Reserve" in your hand, like, for example, three Silver Hand Recruits and Crystal Lion. Also destroy all armor he gets, so you won't be destroyed by Reckless Flurry.

Rogue:
1) Miracle = +1 or +2 stars
2) Quest is might be quite hard matchup, 'coz we aren't as fast as OddPaladin, but we still can just beat Rogue Face, if she doesn't have Preparation + Vanish.
And yeah, Sonya Shadowdancer has invisible Taunt mechanic.
3) Tempo is free matchup if you have Dire Wolf Alpha at the start, 'coz you would just clear all сreatures.
4) BakuRogue was hard matchup for me, but i understood that all what i need to do is to control the board using any ways, you can even trade King Lich with Fire Fly if you have low HP.

Hunter:
I saw only OddHants, so all you need to win - trade WITHOUT using your HP. In this deck we don't have Lay on Hands to become much more fast, so you can restore only 8 HP using Truesilver Champion.

Mage:
Prepare to die.
Big-Spell mage is maybe worst matchup 'coz of infinite amount of boardclears, heal, and boardclears which heal (hello, Baron Geddon). The only chance to win is to see mage without any AoEs till turn 7.
Tempo mage is awful matchup because of:Arcane Missiles, Arcane Explosion, Breath of Sindragosa (goodbye Wolf and Juggler), Cinderstorm...
Talking shortly, it's really hard battle 4 you.

Warlock:
Zoolock is 50\50 matchup. If he has 2 Despicable Dreadlord that's lose. If not - win.
Two cards that you need there are Consecration and Call to Arms.
Cubelock is, probably, 30\70 matchup, you can win if Lock doesn't have any AoEs.
You really need Equality and Spellbreaker here.

Druid:
Taunt Druid is, like, 70\30 matchup, all you need is to rush him. You might need Equality here to destroy all taunts with Consecration, Knife Juggler or Silver Hand Recruits.
Spiteful Druid is a little harder, like 60\40. If you can destroy his board without losing yours - you win
You REALLY need Equality or at least Lightfused Stegodon, to adapt your pallys with Poison.

Paladin:
1) Odd-Paladin is opponent, who is really scared by Consecration, especially with Bloodmage Thalnos, coz it kill even Level Uped pallys. Also, i'd rather mulligan Consecration instead of Call to Arms here.
2) Even Paladin. Well, in the mirror match you need to take the board. Call to Arms, Consecration and Dire Wolf Alpha are the best cards here. Also Vicious Scalehide would be good here.
3) Haven't played vs Murloc and Secret Pallys enough, so i cant say anything helpful her, except of destroying Murlocs and Secret Synergy Cards.

Priest:
1) Spiteful - play around Duskbreaker and you'll win,
2) Control - quite hard matchup, priest has to much boardclears, all u can do - pray that he doesn't have Duskbreaker on 4th turn and you would destroy him before 7th turn.

SHAMAN:
He sucks.