How about this for the new AP item?

Instead of an AP , why not have an AP instead? It makes more sense as few AD champions really use anyway, so why not convert it to AP? It would solve most mana problems while still having counterplay (you have to get in close to AA to get your mana back) and it would provide the stats that DFG had (besides the lifesteal, just remove that from it) while retaining a powerful identity as the go-to AP mana sustain item. Thoughts?