The only thing voidwalker specific on it is life steal triggers on melee. Enhanced armor and the 1st perk are not subclass specific. And I could be wrong, it might read any melee as such and lifesteal. I dont remember, cause I usually only would use praxic fire or purifier robes. But it makes a warlock into a titan who knows magic, basically. Super tank, plus selfrevive, plus warlock shotgun-melee= ragequitters. :p