Mulligans
I’ve been at Rank 5 with this deck, and it’s still going strong. Vs most decks, just play like a midrange C'Thun Druid deck, but vs control, dig for Brann Bronzebeard+Innervate+C'Thun With a Emperor Thaurissan cost reduction on one card or more. This gives your midrange deck roughly 30-40 damage in burst.
Bloodmage Thalnos is the latest addition, but I seems good vs aggro for a Swipe+Spell Damage combo before they can anticipate it, and vs other decks as an easy cycle. If you don’t have Bloodmage, I recommend another Nourish.