I want to go to Australia but earn miles (and potentially use mileage for an upgrade). I am PM. Can someone tell me the cheapest upgradeable and non-upgradeable fares for February or March travel? I also want to maximize my mileage earning opportunity. Korean quoted more than $2K for a non-upgradeable ticket via Seoul. Would it be cheaper to fly AZ or AF to HKG or SIN and then buy a ticket on a non-Skyteam partner. Or could I fly AF to Papeete and purchase a separate ticket to SYD or MEL?

Many thanks.