CurseForge Link
https://www.curseforge.com/minecraft/mc-mods/balanced-enchanting

Mod description
This mod makes vanilla enchanting and anvils cost the same amount of XP regardless of level. I.e. they cost X levels of XP rather than X levels.

Why would you like the mod added?
This mod would make vanilla enchanting and anvils more convenient to use and not 'waste' experience levels if you have a lot of levels.

Thanks for the suggestion. I think this would more or less break the balance of Apotheosis, so it's gonna be a no :)