Bran + Swashburgler and Historian can be really nasty too. Discovered dragons tend to be late game bombs, and you get to pick the one best for the game you're in. I think the Historians are the flex cards in the deck though. I think they are something you could take out possibly for something like Arcane Giants. I think you could potentially replace Sprint with Rag too
Well to be fair if Priest is really as good as it looks, Shaman will vanish