I have the configuration that you are asking about set up on my 14MZ for a big prop plane. I have it on switches so that I can turn each mix on or off in the air as required. I had to set it up using a bunch of P-Mixes, because if you set it up using the flaperon or elevon function it can not be turned on/off in flight. There is always more than one way to achieve an end result with these radios.

I set mine up as Dual Rates for low rate high rate and insane rate where the elevons turn on for the insane aileron rate and/or the flaperons turn on for the insane elevator rate. I also have flaps set up on a slider for landing.