Merely AOA
Primary are pitch and power. Set those right and you will stay safely in the air.
If you know how to find AOA in the maintenance pages of the MCDU, the AOA value may confirm that your pitch and power setting are performing correctly.
Trying to control the aircraft through AOA will be awkward: the MCDU is not directly in your direction of flight, where you would want to have your line of vision.
More importantly though, if you fly the correct AOA, but with too little power set, you will descend.
Trying to control the flightpath with AOA (alone) will easily lead to chasing the AOA value, giving an unsteady flight path.
In other words, pitch and power are the controlling factors.
Don't be fooled by fighter jets, where AOA is used rather than speed, during approach: the symbology is in the HUD and flightpath is then controlled with the Flight Path Vector (akin to the Airbus Bird), also in the HUD. Also, the short, stubby wings have different AOA versus speed ratio's than the slender wings of commercial airliners.