From my experience, the game become more boring and frustrating when we search for 1 legend or eternal for weeks or months. It’ll just lead for player to stop playing.
My suggestion here is create a mechanic to recycle legend or eternal item.
Like this :
We put 3 or more Legend Item, and it’ll be recycled to 1 new Legend that’s not random, but it’ll be more likely a Legend within 1 sets or same rarity with the source.
So we can do more about our eternal item instead just Convert it into Crystal, when Crystal is less useful for old player because they have it so many and don’t know what to do with it.
I dont know maybe it can cost 1M gold or more, or we need 5 items to do recycle, but as long as it can become a new feature later, it’ll a great help to us.
I think ppl will always do that, spam the floor with nardoji, luck, and eternalized.
But, like in example, when you want a Persona to complete set, but you keep get either Sublimation, Projection, or Denial. When the place and the chance for them to drop is same.
If we can do recycle then if we have 3 sublimation, 3 denial, and 2 Projection, but no Persona, we can just keep each just 1, and recycle others.