It's not possible to start in JNB and go to Australia, then Asia, then North America, then Europe, then end back in JNB, because both the JNB-SYD and Asia-U.S. flights would cross the Pacific? I was hoping to find a way to use AA over the water for two flights (Europe and Asia) rather than just one, so I can upgrade. Also, it would allow visiting both South Africa and Australia during their summer, and with a suitably long stop-off in the U.S., visiting Europe in its summer or fall.