The Psyker has an optional talent branching off of Smite that reads “Enemies Electrocuted by you take +10% increased Base Damage from all sources.” I think this should apply to the Electrokinetic Force Staff as well. Please correct me if I’m wrong and it already does, but I don’t believe so.
Rationale is mainly that the electro staff is mostly a CC tool rather than a damage tool already, and you rarely see it in havoc, so it would probably help it shine in that role and allow for some cool synergy between smite and electro staff builds.