Ezreal and Lux Broke the records for the highest rarity skins.

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Well, neither have ultimate skins which are the highest tier of skins(technically). If we say that 2 legendary skins make a mythic skin and 2 mythic make an ultimate. Then Vayne is on the same tier as Ez but Darius has the equivalent of 1 ultimate and no more. So Lux has the highest tier skins.

But tbh Mythic and prestige skins are more rare than Ultimate skins because for ultimate skins you gotta just pay 20€ but for mythic skins you need to pay and to have luck with gemstones. And with prestige skins, either 10€ pass and a lot of grinding or over 100€

So....