I run zephrys. really strong for the last push once you thin out your deck and are nearing your combo. also saves me in a ton of situations.

Mecha'thun warlock feels pretty decent, idk. other than instant loses to hunter and mage it can steal games off of any other deck and wins any control matchup as long as you hex hakkar. i went from rank 5 to 2 in the past few days with it