I'm planning a DONE3 ex-IST on the following itinerary:
IST-LHR Apr 6 BA675
LHR-ORD Apr 6 AA47
ORD-SEA Apr 6 AA1975
SEA-JFK Apr 10 AA198
JFK-HKG Apr 23 CX831
HKG-BKK Apr 24 CX709
BKK-HKG Oct 11 CX712
HKG-DEL Oct 11 CX753
DEL-HKG Oct 19 CX752
HKG-BKK Oct 19 CX701 (extra segment in Asia)
BKK-LHR Nov 4 BA10
LHR-DXB Nov 5 BA107
DXB-LHR Nov 6 BA106
LHR-IST Nov 6 BA676

The plan was to book it through AARTW and ticket through Tal or Spotwelder. Tal is out now, and I will need to pick up the ticket when I pass through IST on March 29, so it may be too soon for Spotwelder to set up. It seems BA IST is my only option. I'm wondering if BA will book/ticket this since the first transoceanic segment is on AA and since I will be posting miles to my AA account.

What do you suggest? I've had one bad experience dealing with BARTW and would prefer dealing with AA. Can I book it through AARTW and then ask them to transfer it to BA for ticketing? If you have a fax and tel number for BA RTWDesk please do post it. Thanks.