Hi everyone

I am planning a trip to South America (Chile and Argentina). I will be travelling out of Sydney - Australia.

My first idea was to fly straight in and out of Santiago on QF and add some internal flights. I would try and do that on QF frequent flyer points.

Now I am looking at the possibility of doing:
SYD-SCL on the way there and

SCL - IPC (stop over)
IPC - PPT (stop pver)
PPT - AKL - SYD on the way back.

What would be the best/cheapest way to do this?
Are there any passes that would include the above route (considering I have to add some internal flights in South America).
Or what are the chances of getting the return leg with QF frequent flyer points (flying Latam and Air Tahiti Nui)?

Any input would be greatly appreciated!
Thanks!