A way to keep Kleptomancy and normalize its power across users

Have mana potions restore a % of max mana rather than a flat amount. As-is, low mana cost champions are balanced by having a similarly low mana pool. When Kleptomancy gives these users a blue pot, they gain a multiplicative greater effect from them than high-mana-cost high-mana-pool users.

If instead, blue pots restored 5% maximum mana over their consumption (6% after accounting for the inspiration tree rune bonus), it would normalize the amount of sustain it generates by a significant amount.

Instead of granting 100 mana repeatedly throughout laning making it a nightmare to deal with, it would grant more reasonable amounts: 20, 30, maybe 50 at higher levels. If these users wanted to take advantage of the mana resoration, they would have to give up damage going for mana early.

Just a thought from a random bronze III