Just being honest. Vex is a lot easier to counter than when it was fresh. It was a three headshot kill back when it was actually hard to get. I've been playing since release and trust me that weapon was dangerous, it's been put through a grinder and attempted to be fixed with some semi positive results. Not being disrespectful, just telling you to figure out a technique that will counter it. Quite personally, I've gotten good with quick scoping with my black hammer to get a body shot then switching to my abyss defiant and killing them in 2 bullets.