Witch Hunter tips/advice?

[Shadowreaver]

So I made a dw Witch Hunter (Chaos/Vit so far) Got enough points in most the weapon skills to max out proc chance (left poison one alone),Maxed out Pnuematic breath and put a point in the transmuter,as well as maxed out possession and six on solaels witchfire while it kills fast it does tend to with hp fluctuate up and down a lot more than I'd like so any tips would be appreciated thanks!

[Valkez]

https://www.grimtools.com/calc/
That helps when you want to show your build directly.

Anyway, you're better off focusing on either chaos OR vitality. It's a simple matter of RR and damage bonus, if you spread your focus around too much, you get less out of both.
As Witch Hunter, both are still viable, although vitality would probably be a PB caster, while chaos with x2 Blood Fangs is great for autoattacks (nothing stops you from trying whatever, of course).

Once you make up your mind on your main damage, just act accordingly.
If chaos, you'll want Solael's Witchblade constellation; Bloodsworns' Scepters are pretty good early on, and the Blood Fangs at 94 are craftable. Also keep your eyes open for the epic medal Black Star of Deceit, it's amazing and I would choose it over even a Direwolf Crest.
If vitality, the epic Omen swords are pretty damn good, craftable and fairly common. Your constellation of necessity is going to be Rattosh. Other than PBs though, you wont get much vitality support from Nightblade, not even on the late game. And even if you go PB, you'll most likely be dependant on hard to find rare/legendary gear.

[Shadowreaver]

I have that medal actually it was one of the many chaos items I had drop that inspired me to make a chaos build. I just have a few levels to go till I can use it ha ha...(Just hit 61). So far I have been fighting with two Death Omen's as they were better and increase execution as well as has damage to health on them so fit quite well.

[Valkez]

Aye, Death Omens are absolutely good. I mentioned the Omen swords only for their early availability and drop frequency. You're pretty much set as you are :)