We figure on staying 3-5 years, but it's open-ended. I'll be a on a 457 sponsored visa. I would expect to return to the US 2-3 times per year at the most. I would plan to book QF as an AA codeshare and credit to AA so I get my 100% bonus. I would plan to fly QF as much as possible but would look to either book as AA codeshares or if that's not possible, book to whatever the cheapest fare is that gets me full miles on AA.
If I were to fly enough to get the segment credits for status on QF, it's not clear what the gets me, if anything, besides perhaps AA lounge access when flying domestically in the US.