Am I the only one who has a problem with Epic Fortitude, Epic Reflexes, and Epic Will? With Improved Defenses or-gawd-Superior Fortitude/Reflex/Will, it seems like these feats are a good way to get ridiculously high non-armor defenses. Add in that the main common items for Head/Waist/Feet are all +1/2/3 Fort/Ref/Will items, and it feels like there's a lot of math-fix type bonuses.
I almost think we need to reintroduce "Competence" as a bonus type. Circlet of Indomitability, for instance, could give a +1/2/3 Competence Bonus to Will. Epic Will could add a +4 competence bonus. Makes the feats give an incentive to avoid the most obvious +Defense items.
Speaking of, maybe change Staff of Ruin and the like from item bonuses to competence bonuses, and grant a feat? Of course, then you have the problem of any remaining item bonus to damage roll powers.