Stormcaller is fine as is, but if it must be nerfed ONLY the duration should be touched, but then buff the jump AND grenades. It is absolutely not overpowered. Anyone who says so is the one that calls for the nerfs on every other class! The only reason people think it is, is because the other classes have been nerfed. So by proxy it has more power. But the answer cannot be to continually Nerf everything until you have nothing left.