I posted this response in your thread on the BA forum:

BA will charge YQ on QF redemption, which I think is $155 since QF and EK recently changed it and isn't really high IMO. However, the avios calculator prices DXB-SYD as 50k in Y, 100k in J, and 150k in F, which is ridiculous. If you connect, then you could probably fly DXB-HKG-SYD or DXB-KUL-SYD which would be 45k in Y (because Avios charges per segment), 90k in J, and 135k in F. However the YQ (fuel surcharge) would likely be higher.
You are probably better off transferring your RBC Avion to AA and their award charts are much lower, only 45k in J and 60k in F as AA will not let you route via Asia. You can also redeem AA on Etihad.
I'd suggest getting an SPG with a 21k signup offer, which will generate another 26k AA. Then you can transfer your RBC Avion which should be enough for a one-way ticket!
You should also considering buying AA miles given that there is a sale, which means it would be around $1550-1650 for 65,000 miles, given that transferring your AMEX MR to Avios still isn't enough for a business class ticket and will probably cost you a few hundred dollars in fuel surcharges.
This might be a bit confusing and should you need any help feel free to PM.