This is the Savjz OTK Warrior with Yogg Saron deck he 
was playing on stream. The Warrior OTK deck has taken the META by storm. It often backfires though if you don’t draw well and can’t cycle into your combo pieces quick enough vs decks that can inflict damage.
This is where the Yogg Saron tech really makes the difference. You know have another win condition. Use Yogg as a backup though, don’t rely on it to win you the game.
It’s widly believed however that if you have cast more than 10 spells Yogg we see you good. Statistically speaking this is true, so use Yogg after you have cast 10 spells if the game looks like it’s slipping away from you.
Give it a go and see what you think, I think it makes the deck a lot more well-rounded. Which is a strange thing to say when Yogg is involved, but it’s going to give you a chance to win those games you wouldn’t have otherwise won.