on my smaller planes I like opposite flaperons mixed to elevator about 30% at slow high angles of attack this increases wing lift while upright and inverted. now this will decrease your roll rate since ailerons are being used for two purposes. I like to roll as slow as possible and bring the ariplane to a stop while rolling in place, this requires max aileron, rudder and elevator inputs using the throttle to maintain possition. as you fly out you need less aileron input to maintain roll rate. a key to rolling harriers is being able to control your airplane with very small stick movement or full stick movement when required. good practice is to set your simulator at extreamly slow rates where you are required to move the sticks full to fly airplane, then switch to extreame high rates and learn to fly with very slight sick movement.