Ok, makes sense. Though at this point i'm confused about how damage conversion works - specifically in which order various effects apply. VS is a phisical hit with 60% chaos conversion (and a small flat chaos dmg). I was taught to focus on +phys nodes in the tree because they would increase the base damage of the strike thus increasing both the converted damage and poison application because the bonus of the nodes was applied BEFORE the chaos dmg conversion.
In this case, you're telling me that the curse and Impale effects apply AFTER the damage conversion, thus scaling obviously way worse because instead of the base damage only the smaller physical part counts.
It's not an issue, i'm still lvl 50 and can adjust everything (i didn't even take the nodes in the tree for impale); also, given this, what should i go with Herald? I'm currently running Agony because of the synergy, but i was thinking if Purity was better for the base physical damage (again, does it apply before or after the VS damage conversion?).