I could for sure be wrong about who played that list.
The great thing about it was that a turn one oath was great against shops and delver. The defense grids were really good against delver and mentor and the helm + leyline was great against unfair decks. I swapped out the helms for serum powders and went all in on the oath plan. The deck had enough copies of cards that you weren't worried about exiling too much.
It was a great deck and very consistent.