Suggestion by @soft blaze
There are a bunch of cool uniques in the game that players might want to use, but no reasonable way to farm them at the point where you most need them.
This is especially frustrating for builds that need uniques to function well, or for players who want to experiment with said uniques.
I feel like the new optional, harder vault objectives could be a good way to make farming uniques for endgame players much easier.
My idea is that every completion crate from one of those vaults will give 1 guaranteed unique item from all the uniques in the game.
It could potentially come with a pity system, where every 10th unique you get is the one you target.
Even if not exactly in that way, I think having better ways to farm uniques would allow cooler builds and more optimization in builds.
A better way to farm them will be somewhat necessary, if they plan to add more of them in the future.
TL;DR
Uniques are too rare for endgame players and there should be a better way to farm them than to fill up the crystals with a specific inscription.