It is interesting in this event that we need to learn how to design decks for the AI to play, a bit like Arena actually.
When I saw the 60 card deck of Calindu, I was trying to come up with something that could beat it with damage and while as a human player I could do it with various decks (fractals or protected growing creatures), but the simulator results came back very bad. Then I tried some 60 card stall ideas, thinking that I would get around 50% winrate, but surprise, the winrate is much better. I had to play against AI in trainer to figure out it was because of the sundials in Calindu's deck. Tthose sundials cause the AI to deck out by pulling cards with them.