IMHO: the Dagger of Throwing and the Dwarven Thrower is cheat items. Maybe it should be the small renewable charge amount, like Quiver of Plenty?
also cheat item is healer's ring. It would be great, if you change it to healing spell. Or you can just add healing spell with power, depends from skill of magic, and area effect (to heal your character and allies), and make that ring heal only your character and slowly.
(sorry for my English)