D&D 2nd edition is 8-18 (regularly, with overstep to 25). 10 points, looks familiar.
Also, it was extremely scarce on giving stat points... so your point with D&D is...?
Tell me what other ability will give the same boost as +3 to a stat... heck even on multiple items on your idea. There is none, indeed.
There are tons of way to balance GOD ITEMS. Uhm, nope?
