Are you open to purple sets? I ask as the set bonuses are always available when you exemplar, which isn't the case for IO sets in general. Most IO's must be in an power that's available at your current level (generally, certain IO's are exceptions). Obviously purple sets are a serious expense, but if you exemplar a lot they are an even better deal for this reason.
My main on live was claws, but I have zero experience with /rad just fyi.