[Snake]

Luminary Element is fine mostly because to reach those big numbers you need to trade away a lot of things that'd make your build well-rounded, for no more than like 60-62 Scaled WIL as you maxcap it. It's the same debacle as Undeniable Innovator, but you have more control over how much you're losing out on other stats, for building damage instead. I'd not touch this whatsoever, it's the most unique and self-balancing trait we have in the game right now.

Impure Element? You bet it needs a bap of some sort. At the very least, making it not work with self-inflicted damage for a starter. If this gets changed, I believe it'd be more than fine to have it be higher, even. Like 2x your Void Energy, since it'll be extremely unreliable to use this way.

A hard cap to elemental attack? I dunno, man. I'm on the fence, but leaning more on 'why bother'. Not many liked when I wanted Hit to be capped, which could definitely even fix problems with Bard's dances making dodge a hard counter to it, but it is what it is.