This build isn't really made for dps, unless you want to play it like that.

Toxin ward deals 5% enemy max health as damage with a guaranteed toxin proc. So the plan is simple, go into a (preferably) corpus mission, group all the enemies up with Ensnare and then just stand in the middle of everyone and watch them die.

Alternative to Ensnare could be Exodia [Hunt] with a Heavy Blade zaw with the [Rending Crane] stance (the neutral combo counts as slams).

This probably won't kill very fast at all, and thats not the plan, but then again you are playing [Chroma], so why wouldn't you want to be lazy.