I have to agree that DR X/magic is largely useless against high-level PCs, after all what PC above say 5th-level doesn’t have at least one magic weapon? (one of my very few gripes about the new DR system) on the other hand, I think DR/epic is too heavy handed for this monster, and I wouldn’t expect to see such a rating on very many non-unique monsters.
Any solutions to this here dilemma?