I came across this level today, and couldn't help myself. It was the first level of the episode and had boosters locked. No win streak or starting boosters allowed.
Far too few moves. Note we have to bring down three dragons and it's pretty well impossible to bring down the first within the given 18 moves. The other dragons will not drop until the first is gone.
It was rated "super hard".
I set out to test how many attempts it would take me to get a lucky board. There are few possible moves early on, so it's easy to spot the best possible move and easy for me to make the correct moves to achieve the best possible outcome for each board.