One idea may be to post in the oneworld forum for the BA/AA/LA side of things. You seem to have a plethora of oneworld memberships and the destinations you want to visit are easier on ow than Star - particularly the SthAm to Oz part.

The Star carriers do offer their own RTW reward options, however each has it's own rules/redemption levels, so a generic answer is impossible.
Searches for previous posts on the matter would seem to draw the general consensus they aren't worth the miles you pay for what you can get out of them.
Welcome to FT.