Well that doesn't surprise me. I definitely feel like I picked the wrong sword.

Nah, Dark Drinker has the area crowd control, Raze-Lighter is all about the single target dps. They all have their perks. How did you go about getting your void ability kills on your hunter by the way? About to be doing that myself actually.

I did mine a bit leisurely. Went to ember caves on Venus, climbed the rocky outcrop in the center, and used the fallen on the platform and the ground in front of it to build up super. Next went over to the short platform to the right where a bunch of dregs, vandals and shanks congregate, tethered, dropped void grenade and poison smoke, rinse, repeat. The respawn rate is pretty decent to the point you're always either building your super or using it. The taken drop in once in a while to break up the monotony and maybe drop some good loot with a 3oC active. Takes a little longer than spamming missions areas over and over, but marginally more entertaining.

Fired up the siege of the warmind mission (TDB), used sealed ahamkara grasps, toxin on the grenade. Melee'd, smoke grenade, voidwall grenade up until the stairs where thralls pour out. Would fire the bow into the bottom of the stairs and let the thralls get tethered. Kill them. Use any void abilities I'd have left. Then jump off the edge before killing the knight at the top. Rinse/repeat.