Others with more AA experience may have a better answer, but AA seem happy to do ticketting even if they are not the first carrier so long as they have flights in the USA and some long hauls - even codeshares (such as trans Pacifics).

As a QF WP, putting your points with QF makes sense - so you get the 100% status bonus.

You could set up the itinerary by phoning your local AA office, they give you the PNR and a quote (specify where you will pay for the ticket), and then go to or contact that office and pay up.

(I'm becoming a AA convert for ticketing as I saw how much less I paid for extras than going through other airlines).