Just don't worry about it. Like I said, the ring isn't even that great. Mundane Ring is like... fifty times better, and I found like four of them.
Regardless, if you're on the 360, you can't finish all of the Daedric quests, because of the Clavicus Vile Umbra glitch, so you can't get
der überquest from giant sea-monster freak Daedra god anyway.
If you're really desperate, you could raise your destruction skill and make AN ASSLOAD of Drain Personality on self spells... or better yet, you could learn the spell and make a suit of lame armor that will do Drain Personality constant effect... that's 50 points right there, not counting jewelry.
Of course, both of those require you to be a member of the Mage's Guild, unless, of course, you want to wait until the Wizard's Tower mod comes out.