Just take off truesight from Way of the Wraith and rework the perk.
Truesight doesn't work well in Destiny; make one change and the whole thing shifts in the wrong direction like the recent nerf.
Take it out of the neutral and just make the invisibility last longer in it's place.
Either that or make the invisibility function like the void empowerment; the way invisibility functioned there would fit Way of the Wraith. That'd be cool, too.