Ask a Bowman Thread.

I followed this build when I was a Crossbowman last year.

You can also look at this guide, I would follow Standard No-FA build 1.

As far as I know, there is no new "revolutionary" build since these were made.

only thing is that you don't save points for IA anymore since the cost increase is gradual rather than a single step at 15.

Personally, I decided to delay getting booster and SA and went with iron arrow just after mastery.