Takeoff thrust.
-Map any button of your liking to TOGA, these are the small buttons on the throttle levers that when hit set TOGA thrust (TakeOff or GoAround) depending the phase of flight. This is how pilots do on real life.
sim/engines/TOGA_power
A/P disconnect.
Never use the disengage bar, this will kill FDs among other things. This is a hard shutoff in case of an issue with ap
Map any button of your liking to ixeg/733/autopilot/AP_disengage. (first clic it will disconnect a/p and you will hear the classic warning aural sound, the second clic will confirm and clear the alarm)
This will emulate the button on the yoke the real aircraft has and pilots use for disconnecting A/P on final approach without removing the flying hand from the yoke.
A/T disconnect.
While on final and ready to take control of the throttles.
Map any button of your liking to ixeg/733/autopilot/at_disengage
This emulates the black buttons on the throttle levers sides labeled A/T disconnect ->
note: once you disconnect A/T you need to move your hardware levers until they sync the aircraft levers current position, then you regain control automatically. This is to prevent a thrust spike. You will see the throttle ghosts in screen for rapid and easy sync while you move your hardware levers
hope this helps