Hearthpwn

I have juggled around different versions and this is the most effective one in the end. Far from being any tier though.

Main differences with other similar decks:

cut Azsharan Scroll: this card looks like a lot of value but for a combo deck it is actually pretty bad. You do not want any randomness and you do not want to dilute the bottom of your deck to be able to dredge for more useful cards with Scalding Geyser

Edit: no Prescience: I decided to add weapon and spell draw instead

only one Criminal Lineup: you only need one for your combo. I know that two will increase your combo chances but believe me you don't want to end up with two of these in your hand and no answer to your opponent's board

Primordial Wave: this is use mainly defensively to counter annoying deathrattle minions, huge DK golems,  mage skeletons, etc...

If you manage to clear the opponent's board JIVE, INSECT! + a discounted Criminal Lineup will most likely kill your opponent for 32 dmg. Versus DKs or high armor / 35 hp opponents you're going to need Ring of Tides from Queen Azshara for a second Criminal Lineup 

Remember to always proc your Jazz Bass after playing JIVE, INSECT! so that the discount can be used for Criminal Lineup

Mulligan: any one mana spell, Ancestral Knowledge, Instrument Tech, Lightning Storm vs aggro, Jazz Bass