Mulligans
Eventhoug this deck is probably rather a fun Deck than a deck to ladder with I think it might has some matchup potential against hyper aggressive Decks with wide boards (Zoo, Odd Paladin) as well as certain Combodecks (Maly, Togwagle).
Against aggrassive decks the gameplan would be just to survive until you can stabalize with The Curator , Primordial Drake and Dr. Boom, Mad Genius … Augmented Elekk here should be used primarily as a 3/4 body
Against Combo Decks it is especially effective if you can get off your main combos yourself. You could either try to burn their combo pieces with Coldlight Oracle and Brann Bronzebeard or focus on your own Juggernut Combo which can be very counter effective as they try to draw their eintire Deck as well.
Main Combos against most Burn or Maly Decks can be to play Brann Bronzebeard with Cornered Sentry and Drywhisker Armorer which could give you up to 56 Armor.
Brann could also be used in combination with Augmented Elekk and Iron Juggernaut though. If you are able to reduce two of these combopieces you can play them together to put 4 Mines into their deck. Especially if you try to go more towards the fatique plan you might want to use Augmented Elekk more to shuffle two copies (potentially 4) of your hand with Dead Man's Hand into your deck.