There's no gear that boosts your stats from 60 - 100. I think it may be possible to build a set but you'll need equipment which has several charm slots. These charms will need to be divine charms which increase your stats by 5+. So if you want to increase your strength from 60 - 100 with equipment, you're going to need 7 divine strength charms and probably two equipment pieces because the most charms some equipment can hold is 5.
Also, these divine charms mostly pop up later on in the game.
Anyway, if I were you, I'd stop at 70. Since your amulet and rings can be charmed (along with your secondary weapon which you wield), you're bound to get some stats up to 100 just through charms.
