Don't forget about leverage. The elevator and rudder have leverage working for them. It is easier for them to change the direction around the wing because of it. The rudder on 3D is usually a lot longer in cord than the elevator also, so that also causes more pressure at the horn. The rudder also is working against the fusalage side area as well. These would require more torque. The ailerons don't have the leverage so they are working against the load of the wing. On my full size biplane, the elevator is very light (can fly with 2 fingers on the stick), the rudder is quite heavy (worked with the feet though), and the ailerons considerable heavier than the elevator. My 2 cents worth would be 1-rudder, 2-ailerons and 3-elevator.