"Sorry, I think you are confused in the bold type above - he is flying from OZ first. By my calculations (using the AAdv QF Points Table 2004), he will get Mileage at 0.5 (due to V fare), QPoints however still at 1.0."
Flight To/From Flown AA Miles Q-Points
QF 51 BNE/SIN 3,814 1,907 3,814
QF 9 SIN/LHR 6,772 3,386 6,772
So at this point, he should be Plat according to my calcs...as 10K Q-Points needed for Plat. Bonus miles on QF9 (for sector reaching Plat) are 3,386 (thus total FF points are 8,679 at this point)"
I used To Oz when I meant From Oz. Your calcs look correct to me. If you sign him up for both challenges it may require consecutive completion ( ie 15k to get platinum rather than 10). There would be no benefit in signing him up for Gold Challenge, just risks
Dave