Originally Posted by spotwelder

You could come back to Europe HKG-DXB-LHR-MAD/BCN-CAI if you want to visit DXB on your trip. This would mean shuffling some of the Asia stuff around a bit to come out of HKG. BCN/MAD are cheap/easy/interesting for positioning in and out of London to stop/continue trip.

In addition, and working from memory, you could be in trouble with the PER sectors as you are only allowed one of these to or from SYD, MEL, BNE and top right. I think you are unrestricted on the single CBR and ADL. Change your route, if memory is OK, to SYD-PER-ADL-AKL at some time of the year.

Why MEL-AKL-MEL-SIN?

Must dash, more later