Some questions needs advise, thanks!

1) I am thinking a LONE4 ex-AKL (I resides in HKG but seems AKL is cheaper and I will take positioning flt with award tkt). Any place will be cheaper?

2) It used to be AA ticketing office in Auckland but I no longer see it listed in AA.com, any one know how I can issue the ticket? (I plan to phone AA RTW Desk in the US and set up the ticket to be purchased in AKL...it used to work but don't know now).

3) AA still has the cheapest overall surcharges right? if no, shall I tkt with CX?

4) The following is my planned itn:

AKL-HKG-DEL-HKG-Asia City #2-HKG-JFK-DFW-ANC-ORD-SJU-LAX-LHR/x-DXB-LHR-HKG/x-AKL

(I think it is valid, any point I missed? The AA's ANC-DFW/ORD is summer only and I will take it at Sept, any chance to get more AA miles?)

5) I saw the HKG-AKL with BA flt number when booking with BA.com but cannot see it with Oneworld Timetable, can I book it as BA number?

Thanks!