A Circle Pacific fare is only available for cash, it doesn't relate to classic reward bookings at all. You might be able to use points on a "points plus pay" basis, as with any commercial fare type, but this is terrible value and extremely strongly recommended against.
The Qantas fare that most people use for multiple-hop flights using points, whether they go around the World, the Pacific, or anywhere else, is called the "oneworld® Classic Flight Reward" officially and often nicknamed to Oneworld Award or OWA in this forum. This is distance based, not continent or location based, but has the requirement that you must travel on at least two oneworld Member Airlines other than Qantas, and the whole itinerary must be on oneworld Member Airlines (thus excluding Jetstar). See
https://www.qantas.com/au/en/frequent-flyer/use-points/classic-flight-rewards/tables.html#oneworld . There are specific threads for discussing OWA's and you'd be encouraged to use one of those to see if your proposed itinerary may work. Do note that finding availability in business class is extremely difficult, especially in and out of Australia, and you must be very flexible and plan well in advance. See here:
"oneworld" award (132.4K/249.6K/318K/455K) Planning - The Definitive Thread