Pretty good MH fare from DPS-KUL-JHB and back (thats Johor Baru in Malaysia, not Johannesburg). £125 in business class. Earns 160 tier points and 3,558 avios. Min stay 2 nights.
Lie flat A330 on the DPS-KUL leg is possible once per day too.
Example dates:
https://www.google.com/flights/#flt=...938*.GBP.11938
£0.78 per tier point
*JHB is a 90 minute + £3 bus ride from downtown Singapore, sitting just across the border.