Damage rings should be close the the 9/4 theretical max, but even then they are of questionable utility more useful for weapons with low damage base.
People who seek out this kind of experiments probably want Str, AR or required dex and a whole lot to go with the rest of the stats.
But really it's just bow amazons, I recon.
5% AR is a joke (compared to skill bonuses) +48 AR is very mid, so the fact that there are 2 AR stats, if of little consequence.