There are no caps on traits. You can't have enough impen (or well fitted), but because it's so hard to stack these days, many people make do with 2K or even less. They have other priorities, like plain old resistances. You best ignore the 33K PvE resistance cap as well, because stacking penetration is very prevalent in PvP. If I was able to get 50K resistances, maybe I'd stop there, but you basically can't, so it's a moot point. Damage is extremely high, this patch. Stacking resistances (Pariah, <cough>) is one way to counter it. If you choose resistance as (one of) your form(s) of mitigation(s), you best stack it well into the 30s.Came back to the game about 2 months ago and have been pve'ing. I found a great site/YouTuber to find pve builds but I have yet to find anything similar for pvp. Is there any place out there to find builds or find information as to why people choose the sets and traits I see such as well fitted and impenetrable and what/if there are caps to these traits.
the best place is probably here. There are a couple of good build videos on the first 2-3 pages.