First off with all the flow programs at regional airlines i would say read the fine print carefully, These programs usually make over promises, so dig in and look at the hardcore numbers.

Second i wouldn't recommend the Asian carriers unless you love china and want to live there forever. I have a lot of buddies doing that thing and aren't getting picked up by the big three.

Your last questions are hard to answer, everything changes so fast especially in the regionals, I would tell you to focus on what you want. A lot of people are willing to sell there children to get to a major airline, my advice is there's more to life than flying in a straight line for hours. Live your life and focus on what you want next. Lots of good regional options out there I recommend Envoy, SkyWest, Republic. Those are the largest and have the most stable growth environments.

There's no secret formula

Good Luck