You may consider joining Swissair Qualiflyer loyalty program.

You'll get a 50% bonus in C class and a 100% bonus in F.

They have Cathay, Malaysian, JAL and Qantas as Australasian partners, and SR does a BKK-SIN or TPE and a HKG-MNL and a SIN-SGN or SYD route.

The only thing is that Malaysian domestic routs are not eligeble for mileage.