Flyingdream you're absolutely correct in your description. What you described is the recommended Airbus x-wind landing technique for the A340.
Airbus does not state that landing with crab is not recommended they do however mention that routine use of aileron into the wind is not recommended.
From experience I can tell you that in strong x-winds the aircraft behaves perfectly during touchdown with a crab. Once main landing gear (bogies) are down the use of rudder to center the aircraft on centerline is very straight forward prior to derotation. Being a four engine aircraft it has excellent lateral stability.
Hope this helps.