The OP is,looking for best way, not worst way. 10000 is not that far from a J flight reward SYD-MEL or similar that includes lounge access.Buy 5x10,000 access visits to the VA Lounge.
I have not checked your profile to see your VA tier though. If you dobt get access, its worth 5 vusits.
Think I saw a visit is 10,000 points each visit.