Mulligans
This deck is trying to efficiently use new buff cards from Mean Streets of Gadgetzan to have a large board going into the mid and late game.
In the early game you should try to use Grimestreet Outfitter, Smuggler's Run and Grimestreet Smuggler to their full potential and buff your hand containing at least 2-3 minions (Hopefully Doppelgangsters π ).
I like the deck, in this build would there the chance to use Don? I feel like the 10 mana Bran + Don combo would be crazy! This may sound indifferent but smaller taunts instead of Squire should be tested. Can you image a buff Senjin?!