Witchhunter build. Following a recent guide but I don’t recall which one.
I’ve managed to level up to 50, but my gear needs serious work. I’m also confused why I have so many fewer skill points to use that the build guide suggests for Lvl50. Can you get more skill points from gear??
Welcome back. 
Yes, many items can give you + to a skill or skills or even all skills. The max for these that you can have is 10 over whatever is what we call the softcap, i.e. the max a skill can be without any extras. For example 22/12 is a skill that is maxed at 12/12 plus has items giving it another 10 on top to make it 22/12.
In grimtools if you hold down the control key it will remove the extra + ones so you can see how many points are actually put into skills.
if you are following a guide, and that guide uses specific faction items or MIs, Monster Infrequents(specific rares dropped by specific monsters), and for some reason you’re not using those items, that might account for the discrepancy in skill points at base.
Aside from that there is ofc a fair bit of rng in terms of affixes or epic/legend drops or crafts you might not have obtained and the author lucked out on.
“Only” 2h ranged witch i see at a glance is this [1.2.1.5] Dreeg's Assassin - 2h ranged acid ABB Witch Hunter, SR 36, Celestials (Ravager of Flesh, Callagadra, Crate) - but it’s not using DEE but ABB
for DEE there is a couple it seems, but none are 2h, and or are dual wield/shadow strike/etc Search results for '#witch-hunter order:latest' - Crate Entertainment Forum
Assuming you’re still on Normal and not elite yet, you just need to bump some of your res a little, upgrade a couple items to fix that and or be more level relevant
You’re already using components so that’s good/on track for how to handle it, just needs to be adjusted to your stat needs.
Devos are kinda fine, Manticore/Acid Spray appears unassigned (but might be due to using comp skill?) - assuming the 2h is just a spur of the moment thing/“what happened to drop” it’s fine there is no Kraken, if 2h is the goal then Kraken should be considered soonish.
Skill points could be optimized/adjusted to take better advantage of nightblade and passives already.
Night’s Chill, Merciless, Pneumatic burst etc - dual blades point ofc atm does you no favour.
You should also consider crafting a Relic, more specifically a +1 class relic if possible (you get blueprints from drop/vendors/faction quartermasters that you can then craft at blacksmith)
example with just some component and skill point changes (still not enough to fully fix aether/chaos res) Witch Hunter, Level 50 (GD 1.2.1.3) - Grim Dawn Build Calculator
example with couple item changes like faction items and MIs Witch Hunter, Level 50 (GD 1.2.1.3) - Grim Dawn Build Calculator - no affixes so stats will only increase/have improvement potential from there
*there is an acid ranged MI weapon example if you press the weapon swap button, but it also requires getting a bit into the AoM expansion/Ugdenbog to obtain
also those are ofc only examples, there is a bunch more available cherrypick items/MIs etc in terms of helmet, shoulders, chest, legs, rings, medals etc “spoiler alert” Grim Dawn Item Database
+1 craft belts etc you can get from faction blueprints and MI drops etc nb; Grim Dawn Item Database , occ; Grim Dawn Item Database
if you are Honoured with any faction you can go buy and apply augments ony our weapon/jewellery from those for extra stats Grim Dawn Item Database