The Brazilian website edestinos.com.br has fares filed for the long run between Dublin and Perth for just $526.72 right now. The flights are sold as Qantas flights but operated all the way by Emirates.
It's a total of 18,582 miles flown. ITA Matrix has the same flight for $1,128.40.
It's not easy to credit those miles – AAdvantage won't give you credit but Qantas and Skywards will. Skywards should give you 15,000 Skywards miles for it
Hot to get to Dublin? Currently Delta and American have fares to the Irish capital for just $534.