Kleptomancy should just be removed from the game at this point.
It has gotten to the stage where everyone and their grandmother takes the mastery because there is no reason not to. It's like when the mastery system got reworked and everyone from tank tops to ADC's just took thunderlords. Remember the flood of screenshots of the 10 thunderlord games that would grace reddit and the boards on the daily?
Who cares about sustain? You're getting potions for mana and HP out of the a**.
Who cares about weak laning phases? You just get a vomit inducing amount of gold from those damn gold packs.
Who the hell cares about wards? You just get free greens and blues from the mastery.
Then of course there's all of the damn elixirs that give massive amounts of free stats.
You created a rune meant for supports that is now abused by everything BUT supports. Even if you nerf the mastery itself that doesn't change that supports use different runes because it just fits them better, and then the mastery will become unbelievably weak after nerfs so nobody will use it. It'll take up a rune slot that could go to something else and sit there for everyone to by pass for the next year or 2 until you decide to rework it.
It just needs to get removed.
For f***s sake the mastery is so good that Trick2G is actually playing league again and using it Udyr. If that doesn't scream red flags then I don't what does.