Is Circle Pacific efficient for SYD-YVR-BKK-SIN-SYD?
 

My mother wants to spend time in YVR and BKK before heading to SIN and going back to SYD before the ticket expires.

I am thinking a Circle Pacific ticket would be the best or would the zone/miealeg based ones work too? Does anyone have the BC fare ex- Australia or ex-N.Z.?

Would this routing be valid:

SYD-(AKL)-(LAX)-(DFW)-YVR-(HKG)-BKK-(HKG)-SIN-PER-SYD?

(substitute AKL for SYD if the fares ex-N.Z. are a lot cheaper).