Originally Posted by
yosithezet
Elite Status challenge on AA requires that you fly on AA metal.
No, also okay on AA codeshares, of which CX has many.
The Platinum challenge requires 10K EQ Points in 3 months; business class earns 1.5 EQP/Mi, so 6667 BIS miles. You earn 100% Plat. bonus starting with the flight on which you cross the 10K points, so if the trip is 18K BIS miles, you'd return with 2 x 18K base miles plus a 25% class of service bonus, or (if my math's right) 45K redeemable miles, plus Platinum status. Not too shabby.