Radiant / Wisp

In general you want to figure out what your best cards are and play 4x of them, and cut the cards that are ok but not as good. Having a couple one-of radiants is fine with the Mitotic Wisp, and one-of infinite hourglass makes sense because you never want 2 hourglasses.

I'd recommend playing 4x of Initiate of the Sands, Devour, Ebon Dune Smuggler, and Preserver of Dualities. Azindel is probably always better than Worldjoiner. Gathering Lights is not very good. You don't currently have a lot of void recursion for Void drummer to be relevant, but you could add something like Shadowlands Guide or Soulbringer. Ephemeral Wisp is a card that has synergy with a lot of the cards in your deck. Archive Curator seems a bit out of place. If you want a way to deal with tricky enemy units, you could try Xenan Initiation, Vara's Choice, Banish, or In Cold Blood.

For the market you currently have 3 pieces of removal, which are all good in similar situations. I'd recommend turning one of them into something that is good in a different situation, like Xenan Obelisk, Infinite Hourglass, Umbren Reaper, Last Chance, or Unraveler of Destinies