I'll give you some of mine based on a few years of experience.
Throttle:
Hat switch: supercharger switch- l/r, airbrake -up/down
Large rotary: elevator trim, center WEP
Slider: prop pitch
button: map and transmit to CC
small rotary: mixture, center button TS transmit(by using the mode rotary on the joystick you can make this 3 different transmit keys)
Joystick: I changed to a CH stick and moved the functions there but I'll try to remember.
Use the 2-stage trigger, stage 1 guns, stage 2 cannon.
hat1: L/R :nav lights, landing light, UP/DN: radiator
hat2: L/R: rudder trim, UP/DN: flaps
Toggles:
1. Tail lock, landing gear- use pinky+gear toggle for manual gear( set up a macro to simulate 40 presses of the gear up key)
2. Jettison stores, gun pod toggle
3. drawing a blank here......