Stop-over spot is typically the partners hub or at the INTL gateway.
LATAM is the only AS partner that goes to Tahiti and there is no award chart for that. I'm assuming you meant Nadi, Fiji?
Qantas you can do stop-over in SYD
Emirates you can do stop-over in Dubai.
Cathay Pacific you can stop-over in Hong on the way to SYD.