Hi, with my Void Knight I also Utilize Warpath, Vengeance with some Other Skills. Warpath is my Mass AE Clear Skill, so i have Skilled the Time Rot debuff, the higher Dmg against Time Rot targets, and after that the Pull in, so i can “collect” all Targets an build Large Packs to Kill. I have skilled all Points in the DMG/Mana Drain reduce note.
For Vengeance i Skilled the additional Ripostes and the 50% Dark Blade Chance on Riposte. Note that the additional Ripostes have to be triggered within the same time Window, you should let some Casters or Bow enemies Alive to Kill Big Targets fast with Vengeance.
I Play it with 1h and Shield, because Blocks still trigger Vengeance Ripostes and my Survivability is much higher this way than with a 2h with still really good Dmg.