Honestly, I might come under criticism for saying this, but I think it's the Vex Mythoclast. People used to say it was really OP, then they nerfed it, and now hardly anyone ever uses it. This is still my go-to gun in PVP, as it is not very hard to control, and still has a pretty quick kill time. Even in PVE, it's able to get the job done most of the time. What do you guys think?