Guild Wars 2

Does anyone know a good rifle build for warrior?

Serfing the zerg?

I play mostly PvE so a PvE build should be good Or a build that is good for everything (idk if it exists xD) so i dont have to reset traits and that kind of stuff

It depend on how you wanna use it, if u wanna use the F1 a lot put 30 points in discipline.
When you create a build you dont only watch weapons,
You also need to know wich utilities you’re gonna use, shouts? banners? stances (useless in pve)?
And if you wanna be full zerker, hybrid or anything else

There are realy 2 ways to play a viable Rifle Build, you either go for a full Berserker geared build and rely a lot on Killshot and Volley to deal high burst of damage or you play a Hybrid build using Rampager gear to still have acces to a viable amount of power and precision but relying more on its bleeds to deal very respectable sustained damage while beeing a bit less bursty.

Both builds are very fragile overall but gives acces to other secondary weapons options, the Rampager build offers a bit less choices when it is about picking up your traits and it also suffers from condition cap in teamplay. Berserker build is more of a two trick pony build, when both of your high damage skills are used you are basicaly waiting for your cooldowns to wear off, so usualy you are better to switch weapon during that time.