Wouldn't the OP be very close to attaining Executive Platinum status?

Based on 70 flights and taking the average per flight as 953 miles per flight
the elite qualifying pts would amount to 66710 plus 19611 for the Perth business class flights plus 2 International flights which should pass or come very close to the 100,000 threshold.

The OP would then receive 8 Systemwide upgrades which can yield an extra 200,000 miles on Coupon Connection and the OP would also be able to cancel award bookings at no charge. The OP would also receive the 2 extra benefits for reaching 40k and 75k miles.

Personally I would then keep the Qantas miles earnt through one's credit card for the occasional upgrade as you will have more than enough AA miles.