If you want to get mages into the jungle...

Then why not give some spell vamp against monsters? As rad as the fancy new AP jungle item is, the majority of mages don't/can't jungle because they have trouble with their first clears, not the later ones. And most of the problem with those first clears comes from a lack of sustain, not a lack of damage. I know this would probably have some unintended consequences when it comes to junglers who were doing fine already, but... I feel like something needs to be done to machete if we truly want more wizard nonsense in our jungling escapades. Any ideas?