This is the Thijs Tempo Mage with Yogg and Ragnaros he was using on 
stream and playing at <100 legend. It’s a fairly typical deck build for Mage, there are a few tech cards.
I like including one Ethereal Conjurer to give some flexibility depending on who the opponent is and how the game is going. I can’t tell you how many times Ice Block from Ethereal Conjurer has saved me 🙂