5 award seats to Australia/NZ? At Christmas? On specific dates? To specific airports?

Be prepared to be disappointed and pay cash.

You will need to be prepared to split the booking up into a 2+3 and book separately. Be prepared to fly into different airports and be prepared to fly each group on different dates.

Otherwise try to get millions of miles on dynamically priced tickets (QF also starting to do this).

Looking at OP history, does not usually engage after initial post.