I pick up a lot of mine on domestic connections. Eg: typical trip of NTL-BNE-SIN-SGN-HKG-DEL-CMB-SIN-BNE-NTL.
If the domestic sectors were in J, during a double SC period you would really rack them up. If he's SYD based doing SYD-BNE or SYD-MEL then international would help a lot. Including on the return leg.
Bonus: If you don't have F lounge access, flying out of BNE means a MUCH better and MUCH cleaner lounge experience.