Keep spells and loot hoarder in mulligan for early board control. This is a slower developing deck, but soooooo much fun! The goal is to get a few totems or minions on the board for turn 5 when you drop Barnes. Why turn 5? When Barnes summons a 1-1 and you use evolve for 1 mana, you get the full version of the upgraded minion! This combo makes some crazy plays.
Also, you can use Moat Lurker / Master of evolution combo on turn 10. Killing an enemy minion then transforming the lurker to a 7 drop is extremely powerful. Rag and N'zoth are for end game. Silences help with the 1 - 1 from Barnes if no evolve, statues, or enemy minions.
I'm no pro and doing very well with this. Super fun. Let me know what you would change.