Trans-pacific awards
I find that it's easier to find award availability on SQ using UA miles than on CX using AA miles in business class. In fact, one can even find award availability on SQ in first, especially on the LAX-NRT route.
I've noticed that CX has tightened up award availability quite a bit over the past year.
UA's business class award to Asia is an excellent deal at only 90,000 miles. And you get to mix and match some of the best airlines in the world including NH and SQ.