(1) No: PEK-SYD:- QF or other any OneWorld airlines does not fly this route. Have you checked that all the segments you list are actually flown by a OneWorld airlines ? The OneWorld timetable & the Mileage Monkey may not like it because you may looking for flights that do not exist. You cannot use codeshare’s. Must be OneWorld metal (see the list of allowable carriers)

(2) Yes, subject to only 2 stopover in continent of origin

(3) Carrier:-. Your first problem is find a D class seat on or close to date you want. Then chose a carrier if you have a choice. LA & BA for me, but others have different opinion’s.