Xcel, wheres the reference for your statement about requiring an ATPL for flying a multi-crew aircraft in Private Ops?
CAR 5.78 What does a private pilot (aeroplane) licence
authorise a person to do?
(1) A private pilot (aeroplane) licence authorises the holder of the
licence:
(a) to fly an aeroplane as pilot in command, or as co-pilot,
while the aeroplane is engaged in a private operation; and
an aeroplane. Thats all.
The A380 is an aeroplane.