@Repetoir/Meddler, Any Thoughts on Jungler Mana?
A while back, in order to make Gragas jungle viable, Riot buffed his starting mana to 400. And that was really all Gragas jungle needed. Couldn't that be a new standard?
Champions like Sejuani, Amumu, Nunu, Malphite, and even Master Yi have ridiculously high mana costs that keep them out of lane, but it also hurts their early ganking pressure because they don't have enough mana left over after their clears to gank lanes.
If the intention of Cinderhulk's changes is to provide a stronger mid game power spike, I feel that getting that power spike earlier will also help, which means giving tanks earlier lane pressure, so the easiest way to do that would be to buff their maximum mana (not their mana costs) so that they will have more mana left over after clears to gank lanes effectively and help their teammates.
This will also help against the inevitable return of Lee Sin, since Lee bullies tanks early in their jungle, giving them slightly better tools to duel, escape, and gank after a duel would definitely help somewhat.