Reflections have a lot more to do with the quality of the reflecting surface, than the camera settings used. As a general rule, if your camera settings are good enough to capture the thing that’s being reflected, then they should capture it’s reflection with equal ease (and quality).
So, I guess the basic rules apply:
- Shutter speed high enough to prevent motion blur
- Aperture high enough that you have everything sharp that you want
- Camera focused properly, so your subject (or reflection) is sharp
And so on…