Trying to put together an award using AA miles. A few questions:

1) What fare bucket are business and first class awards taken out of (i.e. can I find out availabilty on Galileo)

2) I'm only planning one stopover, in Bangkok...however, due to my add-on flight to Katmandu, it makes more sense for me to fly across the Pacific using CX and from BKK back to Texas using QF/AA. For mileage purposes, does this mean I will have only two segments, from AUS-BKK and then from BKK-AUS?