For Explorer, I swapped Sanctum of Ugin for Radiant Fountain, Alchemist's Vial for Wedding Invitation, and Grafdigger's Cage for Weathered Runestone.
Import:
mtggoldfish.com/deck/4948075#a… Here's a couple other versions I've seen floating around.
twitter.com/tiemuuuu/statu….
@Tommy Ashton suggests adding Jegantha as companion. It's castable off the top list with Prophetic Prism, Skyclave Relic, Gilded Pinion's treasure, and Spire of Industry. If you're playing bo1 Explorer, you probably can't give up the wishboard space though.