Hearthpwn

I've played this deck many times before, but now the addition Alliance Bannerman makes it much stronger. Also, the addition of the tech card Battleground Battlemaster can make it so you can finish your opponent by turn 6 quite a bit of the time when combined with Conviction (Rank 1) at rank 2. 

Let's say it's turn 6, and you have a 4/2 and a 5/6 on the board ready to attack. This is perfectly reasonable assuming you got good tempo or some decent hand buffs in the previous turns. If you then play Conviction (Rank 1), giving the two minions +3 attack (as it's past turn 5 to upgrade it to rank 2), and then play Battleground Battlemaster, you suddenly have a 7/2 and an 8/6 with WINDFURY. that's 7*2 + 8*2 = 14 + 16 = 30 damage. Opponents will often make a greedy play around turn 5 or 6 in the hope to stabilize in a few turns, and not even consider you doing 30 damage from a 4 and 5  attack minion on the board. 

MULLIGAN:

• Crystology - gives you a bigger hand and great minions for handbuffs such as Galvanizer, Grimestreet Outfitter to buff your now big hand, or any of the other many mechs to set up for handbuffs.
• Alliance Bannerman - Good chance this card will get nerfed. It's an amazing opener on turn 3 or even coined on turn 2. You get a body, card draw, and buff your whole hand. 
• Mech Warper - Probably needs no explanation. If you even give this one handbuff, it becomes very hard for the opponent to rid off quickly, as you will gain massive tempo playing all your cheap mechs. 
• Only keep Smuggler's Run when ALL your other cards in the mulligan are minions. Otherwise it's better to mulligan it for other cards like cheap mechs, card draw, or other hand buffs.