Like many, Enderlin fight looked impossible and she posted a save. The fight indeed looked impossible in the beginning but after 6 attempts I managed to win in this way:

But it got me a few ideas and I made this video about this interesting battle:
https://youtu.be/ZHWrNyO0HGg
For you Eisenwald experts, a tricky question: how come Enderlin archers shoot our healer in the first turn? She has 70hp, ranged defense is 5, their attack is 24x2 and 20x2 and the distance is more than three hexes?
This thread has also a save for those of you who want to give it a shot.