He used Phantom Beastcrafts, and an interesting Psychic deck. Both decks of which I haven't faced before. So if I had faced them before, the score for creativity would've been a bit lower.
But what helped for Phantom Beastcrafts is that he splashed in some Monarchs, namely Caius and Raiza, if I remember correctly; it was late at night when I tested him, and I remember seeing Caius, but I can't exactly recall if I saw Raiza or not. I thought that splashing in the Monarch(s) was interesting though.