OK, here is a route that goes where you want to go and qualifies for a Global Explorer 34,000 mile fare.
CAI-BCN-MAD-SCL-PUQ-MPN-SCL-PPT-AKL-SYD-JNB-DUR-JNB-NBO-AUH-CAI
This comes in just under 34,000 miles so you cannot add any other destinations to this ticket without giving something else up.
The MGLOB34 fare ex-CAI is EGŁ12000 (€1738).
Edited to add:
If you want to drop DUR (you can buy a separate JNB-DUR-JNB ticket for ~€100) you could add AYQ and PER to your Australia stops, viz:
CAI-BCN-MAD-SCL-PUQ-MPN-SCL-PPT-AKL-SYD-AYQ-PER-JNB-NBO-AUH-CAI
[This message has been edited by ExMo (edited 08-07-2003).]