Nerf the sustain on early game junglers

Obviously there are more reasons than just great sustain in the jungle that make a lot of these top tier junglers. But nerfing the sustain on some of these junglers would increase the jungle diversity without taking away their damage. With some of the obvious ones I'm pointing out being and very likely being others. They still remain strong in terms of damage but aren't able to jungle and remain at near full health without items and levels like the mass majority of the junglers.