Just found LHR-SYD on MH for £2,164.

Book by 25 August

PERMITTED 07AUG 16 THROUGH 11DEC 16 OR 24DEC 16 THROUGH
06APR 17 OR 22APR 17 THROUGH 15JUN 17 ON THE FIRST
INTERNATIONAL SECTOR.

No apparent advance purchase restrictions.

Can also be on BA1-32 and 35 to 399 - so no non-stop BA to KUL, then changing to MH metal for the onward leg, but you could do CW to BKK, SIN or HKG, maybe.

Free stopover in KUL so could be combined with a local TP run.

Tickets into Z class on MH metal at least so would earn a minimum of 560TP.