Your build is to reroll White Lion or Slayer. No, I'm not joking. SW and WH are gimped in multiple ways and Slayer/White Lion are just a billion times better in every single way.
If you INSIST on playing a shitty, underpowered class, then your only option is Assault. Both ranged specs are completely useless. Unfortunately, you're too low level to actually do it, but when you get to 40/40, here's a pretty standard Assault build: 40/40 SW
When you get higher gear with more ballistic skill, swap out masterful aim for wrist slash.
In case it isn't obvious, Assault is melee.
For renown, dump every single renown point you get into Futile Blows until it's maxed. Then do +ballistic skill, I forget the name. Prioritize ballistic skill in gearing; put an armor talisman in every single open spot of your gear, and chug the 0 skill required 880 armor pot+80 ballistic skill pot.
Don't let shadow sting fall off the target. Shoot broadhead while approaching, then draw blood, then knockdown, and spam the **** out of brutal assault. Use Vengeance regularly.
Finally, do not bother trying to play Scout or Skirmish.
Or you can roll Slayer or White Lion and not rely on gimmicks and do 3 times the damage with more utility, more tools, and easier gameplay.