Look on aa.com. Go to AAdvantage and Program Details. Then select All Airline Award Chart under the Awards section. This will take you to
this chart that can be a little confusing until you manage to digest how it works.
So from the chart, and assuming starting in South Pacific (i.e. Australia or NZ), your 90,000 AAdvantage miles can be used thus (besides awards within Australia/NZ):
75,000 miles economy to North America
80,000 miles economy to Central America, South Americs Zone 1
90,000 miles economy to Europe
60,000 miles economy to Indian Sub-Continent and Middle East
90,000 miles business class to Indian Sub-Continent and Middle East
75,000 miles economy to Africa
60,000 miles economy to Asia Zone 1
90,000 miles business class to Asia Zone 1
50,000 miles economy to Asia Zone 2
70,000 miles Business Class to Asia Zone 2
90.000 miles First Class to Asia Zone 2
See the chart fo definitions of the various regional zones.