I put this one together and then looked at some other lists, I've modified my list, gone back to my list, modified and modified.
I've gotten in 150-200 games in the last few days with versions of this. I'm only averaging 60% win with it. Gone from rank 10-7. I've never hit legend, 6 is the highest I've hit.
Here's some other cards I've tried in this deck:
Servant and Firelands Portal are both decent. Best Servant I got was hitting a Mindgames into a Deathwing, but more often than that he kills himself. But, if Yogg himself is overall better with RNG, then why not Servant?
I might go back to him. The Portal wasn't bad either. I took 2 out for the Cult Sorcerers and I think that helps my early game.
That's enough write-up for now...
If the deck looks ok to you, +1, I'll do a fuller write-up if I get 5 likes. But I get this deck looks similar to other tempo mage decks and I'm not a pro player.