For NPAs VAC is as with everything 100% Airbus SOPs.
As none of our approaches are validated, the vertical profile cannot be flown, only the lateral profile.
So NAV/FPA if the accuracy check is high, or TRACK/FPA on 2 engines.
One 1 engine Airbus sop is TRACK/FPA only.
All NPAs are flown as a constant descent profile to MDA where you land or carry out a missed approach. There is no descent to MDA, level off and fly into the MAP. This is in line with JAA and most of the world. It's also covered in Jepps.
Just clarifying the comment on selected approachs only mentioned above.
Incidently with VAC there is no additive to MDA for an NPA which is actually mentioned in FCOM.