This is a deck I made purely out of love of Horseman combo. It is not exactly OTK but it gets the work done. Yes there are 2x Youthful Brewmaster. But with all the draws it shouldn't cause any problems to activate your Reno, Zephyr or Alextrazsa. It is pretty much self explanatory You get to turn 9 you play Uther, at turn 10 you hero power and bounce back with Brewmasters. And second time you hero power you get the second horseman hopefully not the same one as the first but come on it has 25% chance to be the same so yeah pretty good odds. Second time you bounce back your horseman you should use Time out so that you have survivability. And third turn you play garrison commander you summon horsemans in your hands and double hero power and boom game over.
This deck overall has good survivability with it's removals like Wild Pyromancer, Equality, Libram of Justice and Enter the Coliseum.
In mulligan phase if you feel like you are against an aggro deck you should keep Reno and look for card draws.