Thanks for all the great advice. I've dropped CAI and decided on DONE4 out of Aus.

Does the following look ok?

MEL-LAX-YYZ-DFW-YVR-LHR-JNB-SYD-PER-ADL-PER-ADL

I'm looking to experience the best of business class if I can, so any tips on which flights/carrier appreciated (I realsie there's not a lot of choice on most)and also looking to accrue to AA, are these all OK for that?