I have gotten use to shooting magnification, but I don't use it on a hunting bow. I miss it, but I don't want to put up with it. At 4x with a larger peep I'd want a clarifier, which can be more of a pia than dealing with keeping a lens clear.
Could use 2x, but it doesn't seem worth the hassle.
Keep in mind the X factor also depends on how far out the lens actually is. I bounce around between a 5x and a 6x, using the 6 where the sight is a little closer in and it gives me the same sight pic as a 5x with the sight further out. Just depends on the bow and where it ended up torque tuning.
Personally I also like a smaller housing than I use on a hunting bow to use a lens. That's just a personal preference, use a smaller peep to help keep everything aligned easier. Hunting bow I prefer a larger view.