Gosh the diversity of builds in this game never cease to amaze me.
Venomblade witch hunter?
Be me. See fancy spinny b o i. Loving EoR and loving the ideea of a Relic granted skill, I decide to try it.
No idea what Pierce is all about. Stumble my way to 94 on Boring Wave. Had a decently rolled SR set waiting.
Build is really good and more importantly, satisfying! 
you explode in these beautiful blue bursts that one shot anything under Hero level mobs. It is super fast, feels like the archetype of fast elusive massive damage is well represented.
Then I try SR 65 and get Kupa, Mad Queen and Fabius perma gang-bang and brick my run. Is this build sturdy enough to go through SR65-66 fast runs? Speed is there I just think some Boss combos are entirely unfair so far. Regardless, @Valinov great, great spinner to add to my already large collection. Well done mate!
I just realized that I never posted the new video after plays.tv was rip.
Added YouTube video to the op