Hearthpwn

This deck's tactics does not depend on overwhelming your enemy. You need to kill him with a fully different strategy:

First scenary how the match could look:

Step one: mulligan for backstab and some earlygame minions

Step two: use face and spells to kill enemy minions and watch your own growing

Step three: make a huge stuff on the board using Tinker's Sharpsword Oils and Cold Bloods and send everything in the face, than conceal for the unclearable lethal next turn

Second scenery:

Step one: if you don't done to mulligan for cards recomended in first scenery, play "tempoily" and hope you get Gadgetzan Auctionar before turn 6 comes

Step two: Summon Gadgetzan Auctionar on empty board or with Conceal so it can survive preety long

Step three: you should have lethal