I don't think you can get 38.5 PPS sectors on a single *A RTW, but depending on when you're renewal date is could (re)qualify for this membership year and make a good start on next year (by travelling in the new membership year).

If you need to include both CCU and SYD (and YYC) on the same ticket that will be difficult within 29,000 miles. If they could be on separate tickets then BKK-CCU (TG nonstop or SQ via SIN) may not be too expensive?