Beating Nightsisters?

Now granted I am by no mean saying I am any good at this game, but this was simply amazing to watch how simply I was dominated by NS. I tried many so many different combinations of teams including full Phoenix, Empire team with Bobafett as leader, also switched it up with Vader as leader which all were simply dominated. This was in the Arena 2nd purple box which was the most confusing part because I have finished all 12 level multiple time with weaker squads. Just watch this video it was just amazing to see how badly I got my butt kicked. Can anyone give me suggestions based on what you see in my character library about what I could have done because I just have no clue?????

https://www.youtube.com/watch?v=SJfQWSVhQdw&feature=youtu.be

Thanks for all suggestions in advance.