I used Knock Off Before, and it never worked perfectly. U-Turn I won't put because I would like to stay in to hit Ferrothorns and other Pokemon weak to Bug. Drill Run would be fun though...
Just saying, you would rather hit and switch out of Ferrothorn than stay in and X-Scissor. Ferro threatens to OHKO you with Gyro Ball or cripple you with T-Wave, so it's not worth chunking it for more damage and leaving your MBee vulnerable. Furthermore, most offensive 'mons weak to Bug would get OHKO'd by U-turn anyways, whereas most fatter 'mons wouldn't get OHKO'd by X-Scissor anyways.