Hearthpwn

Still my favourite pally deck I've created as to this date. And I have been playing pally since season 1, with 1372 ranked wins so far. The deck isn't too hard to win with but really difficult to play perfectly. Because of the jousting, the Prismatic Lens and the Holy Wraths you'll have to do a lot of chance calculations and remember which cards are still in your deck. There are a lot of paladin cards in here that I never have much use for while in this deck they all seem to have a nice fit.

Muligan:
Always keep Prismatic Lens, Bright-Eyed Scout and Argent Lance.
Pretty much toss the rest. 
Might keep the Pearl Spellstone if you think you are up vs aggro (and you also got a Seal of Light in your hand so that you can buff it right away). 

Tips:
I often throw Holy Wrath at enemies face. If you manage to get the 20 damage from Molten Giant it's hilarious.
Try to remember which cards are still in your deck to get the most value out of Holy Wrath. If you still have Forbidden Healing x 2 in your deck you might get 0 value out of Holy Wrath (the Forbidden Healing is good to have in your deck for the Prismatic Lens value, so you might want to play that instead). 
---
Pay attention when using jousting cards early on. They can reveal your enemies strategy. Don't underestimate how valuable this information can be.
---
The deck actually has a ton of swords. Have you received many swords in your starting hand? Consider using them liberally. You just found out thanks to Argent Lance joust that your enemy is using a deck that hasn't got much minions? Use your swords liberally (use them to attack enemies face).
---
The deck is lacking board clears. Nothing counters this deck more than a minion spam. When you see the enemy is using a zoo type / minion spam deck you'll have to get lucky with giants/ Argent Lances. Argent Lances early on for clearing, cheap giants to win the game as soon as possible.
---
Enemy has 30 hp. You have 2 giants on board, 10 mana and 2 Holy Wraths in hand. More often than not, this means you have lethal. Even when your enemy has an extra 6 armor this would often be lethal. Keep in mind lethal often comes earlier than you think with this deck, but you'll have to remember which cards are left in your deck to know for sure (but don't use deck tracking software! This is lame. use your memory)
---
Don't give up hope too soon. When the odds are stacking up against you, don't be quick to surrender. The deck has a ton of heals and you'll never know when you'll hit that miracle Holy Wrath into Molten Giant combo. Or that miracle Prismatic Lens into Forbidden Healing-Y'Shaarj, Rage Unbound, and Y'Shaarj, Rage Unbound pops out Tirion Fordring or The Lich King. I've seen some crazy stuff happen with this deck. 

Have fun!