I completely disgaree, my wife and i have gotten more than that and still have excellent credit scores. I would agree with diversifying into hotel programs...you have to stay somewhere in Asia and SPG has some great properties in Asia for low # of points. You can do SPG, Marriott, IHG, Hyatt, and even some Hilton properties with good value depending where in Asia. Barclay Arrivals and Citi TY are other good options for buying cash tickets with and earning miles on the ticket. You also have DL and if you know the tricks you can get low level award space and their miles(pesos) can be minted quite easily

I have been to SE Asia 3x this year and heading back for another month soon. You are far from done, but you will need to get creative to earn UA and AA, but there are ways to ramp them up as well.