I think the proc need to be buffed generally. Actually I think it might be better to make the xp and luck boost permanent, especially considering that the stats are pretty bad even now and surpassed by a number of other rings and that with the new lvl cap the ring would be pretty much obsolete on lvl 41. I tested it on my rogue for one hour of braken runs and had the buff during the Jarl kill exactly 2 times?! Not even funny: 2 times in one hour.