Got another win on this patch, still not sure what I'm doing.

Decided to play Alexastrasza (when you get to tavern tier 5, you discover 2 dragons). Picked up Kalecogos (everytime you play a battlecry minion, you get +1/+1 to all Dragons) + the 3/6 dragon which gets +2/+2 every time you drop a shield.

Before this I was half Demons, half Mechs and just transitioned smoothly to all Dragons (plus a pretty beefy Hydra) and was just hitting people for 15-22 to kill them until I swept the lobby.