I've been using Mienshao as a wallbreaker, in conjunction with Scarf Heracross. Mienshao and Heracross share a lot of the same counters, so Mienshao can effectively weaken/ko most of Hera's counters early/mid-game and open up a moxie sweep.
I don't like the idea of being locked into Hi Jump Kick with Cofagrigus gaining as much popularity as it is. Cofag doesn't even mind most pursuit users, and can just stay in and set up a Trick Room. Also, as long as your opponent's ghost is still alive, you have to worry about your Mienshao losing half of its health every time it tries to revenge kill something, or the opponent boosting again if you U-Turn.