Cross-post in the bug forum. I'm not sure what's going on, but I had to share this epic fail.
The defense does have an air sweeper, but I don't think it was the decisive factor in the battle. During the second play through, I zoom in on the archers, and you can see the first set of dragons (enraged, healing, and not attacked by the air sweeper) are only killing one archer per shot. Weeeird.
https://www.youtube.com/watch?v=-V3fTH11COg
Wash
