Another way to stretch those AA miles is to get one of those AA World Mastercard credit cards. You'll get a 10% redemption discount up to 10,000 miles per calendar year. Correct me if I wrong, but I believe this means you can redeem 100k in calendar year 2013 for 2014 flights and get 10k back, and then redeem another 100k in calendar year 2014 for 2014 flights for another 10k back.

Remember that if you redeem for a round-trip award or even an open-jaw, you could be able to work in stopovers. For example, what if the award is open-jaw, outbound on CX and return on MH? You could get stopovers in HKG on the way to destination #2, and KUL on the way back from some destination #4, all four stops on a single ticket.

A few years ago, I got AA economy award travel SFO-ZRH and CDG-SFO on the return. For SFO-ZRH, I had a three day stopover at LHR. It was an off-season 45k award. With the credit card redemption discount, it came out to 41.5k.

Take a look at the airtimetable website. It lists an interesting collection of Asia airpass programs. Some entail a collection of Low Cost Carriers. Those may be interesting deals. One of the better known programs, which is single-carrier specific is CX's Asia Pass. SQ used to have an Asia Air Pass also, but I'm not so sure anymore. The spot on SQ's website seems to have been abandoned.

There's also mixed-carrier passes like United Airlines/Malaysia Airlines or Air New Zealand/Singapore Airlines. You have no interest in going to India, Australia & NZ do you?