Mulligans
Have been using this Tempo Mage list for the new Shadow Towers Tavern Brawl and it has been working pretty well. Cards like Demented Frostcaller , Flamewaker, and Questing Adventurer can get really out of control with the stealth mechanic.
You might notice a lack of GvG and Naxx cards. This is because I have personally committed to Standard and have dusted all my copies. However, I would definitely recommend giving cards like Flamecannon and Unstable Portal a try if you have them. Especially Flamecannon, as it will ignore stealth.