The best-of-one format in Master Duel calls for a change in mentality regarding deck building
All you need then is a way to repeatedly untap Emry, like Mirran Spy, and you have yourself tons of mana, draw power, or a massive storm count to combo off with
You can't have it get just one kind of counter it already has and not the others
Less obvious but sweet tech that I'm throwing in are some free to cast spells like Angelic Favor, mana-neutral spells like Unwind, and some cutesy ways to guarantee draw like Undermine
You can see how these will easily just fit your commanders condition, as they help build your spell count out
Will they continue to hold strong in the top 50, or will we see declines in their data as Treasure, rituals, and efficient mana rocks become prioritized