It really isn't.

And even if it was, you just never done across people wearing 2 silvery rings.

It's how I took out all the melee classes so easily as lowbie ap, even though assassins had throw at low level too. Whereas muters were tough.

It was unusual to have more than 1 melee hit one on me before the other guy, or guys, were dead.

If you have good dex,and gear for ac above other priorities, then slap on sheen of stone plus (potentially) your class equivalent of armour, you are golden. And in the sanctum you can layer on shield and the equivalent of barrier. For AC rather than redux.