Used this list to climb to legend during RoS seasons. It's mostly a control deck with Shudderwock as a win condition.

Against aggro: keep all your defensive tools and stall until they run out of steam, you have more than enough cards for this.

Against control, always try to either get Zola the Gorgon, Bog Slosher or Shudderwock from Jepetto Joybuzz or at least get Zola's/Bog's battlecries played along with Doppelgangster's before dropping your Shudder. Another option is to combo Zola and Bog several times across one or two turns to guarantee obtaining a copy of Shudder from its own battlecries after having triggered Doppelgangster.

UPDATE 1 (Uldum): Added Siamat and dropped one Glacial Shard. Might consider including Plague of Murlocs.

UPDATE 2 (September): Added Eater of Secrets and dropped one Corpsetaker to counter all the Secret Mages.