Idea for New Vendor Recipe

Last patch we got the new weapon+wethstone+rustic sash recipe the increases physical damage, its fine. now my idea

trade a wand or sceptre or dagger or whatever can have spell or elementel damage with a wethstone and for example ruby ring to give it a % of increased fire damge , or another ring like diamond ring to increase the critical chance, or ruby, sapphire, topaz for % increased spelldamage, that would help leveling casters (which is very terrrible compared to physical attackers).