I would seriously ask yourself what kind of person you are. The people I have met who excel at the night sort flying tend to naturally stay up late. 1- 2am. So extending their night to 5 or 6am isn't that hard with a nap on day 1. If you are a 10pm to 5am sleeper it is going to be bear to flip your body.

Lots of internAtional flying which might be easier, but if you will most likely be on reserve for a while, so you might get the night sort.

And, if you really want to gamble, then think we will get the 117 rules and everything will be rainbows and unicorns.
Good luck