Hearthpwn

I like the concept.  Thank you for sharing it.

I assume the single treachery is there so if you get a bad demon from the project, you can give it to the other guy? 
2 heal bots, AND zilliax-- Don't the two heal bots slow the deck down a bit too much? 
How useful have you found Rin?  I recently crafted her myself, but I find most games are decided before I can summon the big guy.

Treachery is only to donate them a Doomsayer later in the game to clear the board. Bonus points if Big Priest resurrects it.

Rin, the First Disciple is needed against other slow decks as Big Priest, Reno decks and Odd Warrior can actually win in Fatigue without that card. You can run Mecha'Thun package instead.

2 heal bots, AND zilliax-- Don't the two heal bots slow the deck down a bit too much?

It's a slow control deck anyways. Most of the time your win condition is denying their win condition. I like them over other commonly played healing options like Amethyst Spellstone or Mistress of Mixtures. Note that you can use Zilliax' magnetic option with an Antique Healbot on board.

The reason I was looking here is because I wanted ideas for something to run BESIDES Mecha'thun lol.  Many of the decks I have encountered of late are running disruption to such a degree that I have found it impossible to get him safely to the field. The thing I like about Rin is that she is a stand alone unit (not requiring a combo) and it is much harder to mess up.

I guess I will have to craft Zilliax next then.  I have also been looking for a replacement for spell stones.

Thank you for explaining that.

Why Demonic Project over Dirty Rat?

It's way better against Big Priest. It removes one of his guys before he even has a chance to play and res it.

Makes sense. Thanks!