oneworld - Please check my routing for a DONEW3

Please will somebody check this for me.

It should read DONEWC3.

CPT-JNB-HKG-PVG-HKG-MEL-WLG-MEL-CNS-MEL-SYD(buy this leg as an extra)-JNB-CPT

Please advise if that works.

Also I noticed one can get on Jetstar services, does that mean one would sit in Star Class or in Economy?

Looks valid to me

Your fifth SWP segment (MEL-SYD) will cost you USD400 if flown in business (USD150 if in economy). It will be cheaper to have that as a surface segment and buy the flight separately.

You are only using 12 of the allowed 16 max flight segments - perhaps consider two more flights in Asia?

Thank you for the feedback. Time is a little bit on an issue in Asia hence I am missing a few flights.