The Juggermill is real! This deck consistently Crushes all opponents, strong against all classes and I have yet to lose to a hunter! Probably the most fun deck I have ever played with no scripted play style. Depending on the matchup your Youthful Brewmasters can always win the game for you. Return Antique Healbot or Shieldmaiden if you need a health or armor boost, or obviously stack their deck with 2 or 3 Burrowing Mines :) Staying alive and keeping your opponent's board void of minions is quite easy and epic wins ensue!
1st attempt at writing a small little guide:
Against most classes you want to mulligan for Fiery War Axe, Deathlord, Whirlwind, Explosive Sheep, Shield Slam, Execute, Shield Block, or even keep Crush if you have a Deathlord. If I expect aggro and have a weapon and one of these other cards I will keep Brawl.
Against Warrior you are better off with a Death's Bite than a Fiery War Axe so you can 1 shot their Armorsmiths and you also don't really need the lower costing cards. I haven't had too much trouble with warriors, but they seem to be rare right now.
Explosive Sheep is great against Druids since they will usually play an early Shade of Naxxramas other than that any low costing cards are fine, probably keep Shield Block and Shieldmaiden even so you have too much armor for them to combo kill you.
Zoolock: (same thing as hunters really)
Handlock: sadly easy matchup, I always mulligan for zoo, but if I happen to play a handlock and get Coldlight Oracles I always play them early when the handlock has 8-10 cards in their hand and burn their cards
Mages: same thing as zoo/hunter, but if you happen to play against a freeze/fatigue mage you really can't lose. This milldeck counters other milldecks hard.
Priest: Usually don't come out with guns blazing, let them draw their cards with their cleric, it helps you win. Just armor up and play very passive until they play something worth killing. BE CAREFUL PLAYING Ysera if you are running her! Maybe don't even risk it until all other options are exhausted!
Rogues are so uncommon right now, just expect mech rogue and keep some low costing cards.
In the early game I often just armor up as much as possible, but kill any major threats like Undertaker and Mechwarper obviously. Dont be afraid to use a Shield Slam or Execute on some piddly little minion, because this deck has enough removal to kill every minion in an entire deck and leave them with nothing.
If you don't get a terrible hand and make it to turn 5/6 without being overwhelmed you start dropping Antique Healbot and Shieldmaiden and by this point zoo is usually out of cards and out of steam and it's an easy win. If your health is still low use one of your Youthful Brewmasters to return the healbot or shieldmaiden to your hand and use it again.
Turn 7/8 I very often combo Brawl with Explosive Sheep or even Coldlight Oracle, you can also just use a Crush for the full mana cost to remove the Dr. Boom or other big turn 7/8 threat they just played.
After this point you just keep their board clear, armor up, Shieldmaiden is usually good for killing something. I always try to save 1 brewmaster for my Iron Juggernaut, but it's not essential to winning. You can put a Burrowing Mine in their deck before or after [card]Alexstrasza[/card] I often keep my coin until turn 8 just for an early Alex. at this point you've probably won, use your oracles and make them run out of cards, you win. If they still have 20+ health and I'm at < 10 I will just use Alex on myself a lot of times because the mines and fatigue damage will kill them anyway. Better off staying alive and making them die slower than risking your own demise!
SEE LATEST EDIT FOR POSSIBLE CHANGE, STILL TESTING!
I was trying to keep it as budget as possible with only 2 legendaries, but if you want to add more, Ysera and Baron Geddon work extremely well. Baron is like a mini brawl that gives you a nice 7/5 body that they have to deal with, combo with sheep for even more destruction! Ysera can also give you a board clear and free minions to drop when your opponent's options are running thin. Or there's always Sylvanas Windrunner and Dr. Boom of course. All good choices depending on preference.
Cheers! Happy Juggermilling!