Help with a DONE4 itinerary!
 

I'm hoping you wonderful wise wizards might be kind enough to take a look at my rough DONE4 itinerary, and to offer your pearls of wisdom... ;)

I'm leaning towards ex-KHI stedda NRT, simply because I haven't heard any persuasive reason why Japan is worth $600-700 more than Pakistan (I'll be in BKK at the time). But if you've got one, I'd be grateful to hear it.

My priorities on this trip are, in descending order:
a) to get from sydney to new york, LA, london & back;
b) to enjoy some nice J cabins along the way;
c) to stop over in some cool & interesting places where I wouldn't normally go; and
d) to get miles & status (pref with AA).

How do you reckon this routing fits with those goals...?
KHI-HKG CX
HKG-MEL QF
MEL-AKL QF
AKL-BNE QF
BNE-CNS QF
CNS-SYD QF
SYD-JFK QF
JFK-YVR CX
YVR-MEX JL
MEX-ORD AA
ORD-LAX AA
LAX-LHR BA
LHR-MCT BA
MCT-AMM RJ
AMM-DME RJ
DME-LHR BA
LHR-NRT BA
NRT-DEL JL
DEL-HKG CX
HKG-KHI CX
= 59,710 base miles

Are there any similar routings which would offer better mileage opportunities or involve travel on carriers with a superior J class service? I'd be interested in your thoughts...

You could go HKG-AKL on CX and then back to Aust to get a few more miles. From CGM.
HKG-MEL-AKL-BNE-CNS-SYD 9745 miles or
HKG-AKL-MEL-CNS-BNE-SYD 10092 miles or
HKG-AKL-MEL-BNE-CNS-SYD 10272 miles

You could go to Alice Springs or Darwin that are interesting place's compared to big cities

Some on the Aust-NZ QF flights use B737's or B767’s with domestic business class seats. Some segments, like QF25 MEL-AKL, use B747 with international configuration business class. Pick your segment-aircraft if that is important to you.

Also need to consider the time of departure & arrivals and if want to maximise or minimise day or night flights.