Ask a Bowman Thread.

Get sharp eyes first, not only will it help your damage the most (because hurricane relies on criticals to deal decent damage due to its speed), we neeb it for our boss runs >:O

This is false. Hurricane to 21 helps damage the most, then a smart distribution between Bow Expert and Sharp Eyes will keep it high. Bow Expert is actually higher priority than Sharp Eyes, too. The only reason you even need more than 1 SE early on is for the timer. I can post some numbers if you're interested.

To LaLaaLove: Get 21 Hurricane ASAP. After that, get Bow Expert to 27. And after that, Sharp Eyes to 29. This will grant you the best damage you can do with your SP.