Traits
Running dual bows, or even just one bow for that matter, 20 pts in Marksmanship for piercing arrows is almost a requirement. For any game content. It makes bows that much better.
If your unsure about builds I HIGHLY recommend checking the New To Rangers? Looking for guides? CLICK ME!] page, its stickied at the top of the ranger forums if you cant find it.
If you want to use shortbow+greatsword you could check this page out:
https://forum-en.gw2archive.eu/forum/professions/ranger/Hybrid-BeastMaster-GS-SB-build-guide/first
It has a vid demonstrating how to use the build.