I've been away from OW RTWs for awhile. I've forgotten everything I knew, and probably much has changed, anyway.

I'm looking to buy either a DONE4 or DGLOB34 ex-South Africa. Itinerary is fairly simple -- JNB-HKG-NRT-BOS-DFW-DEN-DFW-BOS-LHR-JNB. (I understand that I'm leaving a lot on the table.)

It looks like I have to reserve/purchase by phone (can't use the online tool -- for one thing, the JL NRT-BOS non-stop doesn't show up on the blessed thing). I will arrive in JNB on the afternoon before I leave on the RTW. What's the best way to handle the reservation & purchase -- call CX (first flight)? call the AA RTW desk?