if you look at every meta lcs jungler.

susain. now graves doesn't have sustain. but he lifesteals a lot from just the jg item. and he takes no aggro because of his passive. artificial sustain that works.
but the other top 3. gragas. elise. and reksay. all of those. have sustain. kindred was still a contested pick until after that one sustain nerf he got on his W. that removed it.
doesn't take a genius. stop making jungle champions that can clear both sides and come out with full health.

in this thread? She's probably the worst offender in this group... She doesn't require mana past the first clear and has an absurd power curve. She has a strong early game but also requires no mana to tussle at close range for a 1400 damage combo with a lich bane and runic echoes... but I digress