Well to get to my figure for the J/F split I took the following sectors in F/A, on the basis of what is currently showing in itn.net for June next year which is when you would have to do it to get the ANC flights:

HKG-AKL; SYD-LHR-DXB-LHR; LHR-LAX-JFK-DFW-ANC-DFW; JFK-HKG