I was thinking about the epic feats, specifically how the save feats allow you to succeed even on a natural 1. Could this mean that you could, with a high enough modifier, never fail on a reflex save, thus always get evasion (if you have it)? If that's the case, you would never need improved evasion. This feat could make you immune to most forms of energy damage! Or is not possible to get your reflex that high? Even on a halfling rogue dex build?
I know there are still a bunch of good feats for this level, but is this overpowered? I'm thinking it would great to be able to walk through any trap and face casters with impunity and never miss a save.