havoc orb, evasion, phantom blades, stings of krearion, wailing arrows. Go pure ferocity and crit
passive skill tree: go red side and pick up wild card, then into middle ring: red section go straight for "feast for the crows". then you can get really any outter ring green section for a traditional ranged feel. "cold blooded" is always nice.

https://wolcen-universe.com/builds/g0Mqpy-frost
Use frost spells and abilities. Start by going straight for white arrow, then fill out ranger, then soldier and finally assassin. Lots of damage and fun too!

White arrow and melee dmg from soldier passive tree works with a pistol?

What about the White Arrow tree wouldn't work? Its all proj dmg. And no the melee probably doesn't work however the crit dmg works! :D

Yeah melee damage doesnt work but all others do, really you're there for the huge crit bonus

Don't go for range build, it sucks like hell.
I went to lvl 70 hoping for something good to happen... never happened.
Most of skills and % calcultations are broke in the badway.
You would think that going for agility would be a great idea for range, actually it ain't... most of stuff have ferocity bonus stat on them (90% is ferocity, 10% is wisdom)
The attack speed ain't scaling right, the % is randomly added or multiplied, you'll have to test to verify which one it is, but for sure your dammage won't scale right.
Actually, most of your skills will deals less dmg than you auto-attacking. The piercing bonus dmg is broke as hell, nowhere to right scale.
Gunslinger's brand should be a huge to go skill with its 10 bullets to the same target but with -30% dmg malus, except, taking this rune will break your dmg.
Without this rune, your crit dmg with this skill go from 3 to 4 times the dmg you make while you equipied this rune... in terms of number it would be like 30-40k hit without rune to 10-15k hit with the rune.
White arrow build sounds good, except most of bonuses on ranger stuff is poison or ether... ailments bonuses are with these two...
Even tho, the skills are performing way worst than auto-attack : casting time, dmg mitigation / bonuses... etc... where you would hit for a 50k dmg with a skill, charging it, you would have shot it almost the double with auto-attack.
Only the turrets is good cause you don't have to charge it and can spam it with reduced cooldown.
Same goes for Wailing Arrows, dmg calculation when taking bonus for each ennemy affected by is TOTALLY random. If you take bonus for increasing the AoE, dmg just drops... some times you just hit for huge xx k crit dmg, sometimes, you don't even do 1k crit dmg... this is totally stupid !

Trust me mate, actually going for range is a no go. You'll do far more dmg and have far more survivability going for melee build or ailments mage build...
It even appears that you'll have way more damage in range going for retaliator passive red skill and wearing a Heavy Armor with all stats in Ferocity and Toughness than going Rogue armor and go for Agility.