Hearthpwn

still winning D5-D1 ;)

mulligan: 1-drops, you can even keep polkelt if you are against control 

worst case scenario: you draw altrius and skull in this order before turn 6, but not that is much of a problem: the cardcost of this deck is so low that you can easily dig it out

general gameplan: 

against aggro, no need for Polkelt

against combo or control: empty the hand, till you have maximum a cardvalue of 3 in hand, then slam polkelt and do the altrius thing

earlygame: dump all the 1-drops and go face (avoid playing altrius), play only the spells you need to (get through taunt, enable intrepid guy, draw if you run out of guys) and get maximum out of outcast, don't draw unnecessarily before playing Polkelt with him in hand

midgame: if the opponent is still there, play your skull and fill your hand. usually you are so far ahead, that you can wait for one or two turns and the opponent fills the board. with 5 or 6 cards for zero cost bring altrius to the board, clear it and hit face very hard

EDIT: Polkelt is no more reason for keeping the coin, and the weapon-nerf enhanced the draw in the Altrius-sequence... everything gucci