Guardian Angel for each role (idea)

I just got this idea ( dont know if someone have posted it already) .So the main idea is to create a guardian angel for each role for example riot could create a guardian angel for AP role / Tank role .The purpose, of making such thing, is that AP champs wont have to buy an item that has as its core Damage ( same goes for tanks) . In the case that the existed GA(guardian angel) is already powerful riot could nerf it a lil bit but make it based on each role.I hope my idea is helpful. :)