You need an LONE6 due to the transit in North America. Also JL is not yet a OW member and hasn't been added to the OWE fares (at least as of yesterday). JL has been added to the Global Explorer fares, but you aren't interested in using those. In general L fares are cheapest from Australia, so you might want to originate there. You can also fly SCL-AKL...-Asia to stay on an LONE5. Asia/Australia can be in any sequence. Your routing looks ok but I didn't examine it too closely. In the current rules there aren't any restrictions on MRU-JNB (but there were also no flights, so they might add a new rule, however I don't see the reason to add a restriction).