PReDS
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If you don't use magic, you'll probably lose 5 units.
If you use a wall of fire, you'll probably win without any losses.
I would say that you'll take it with a loss of 5-7 air units, but a couple of morale for the dwarves and the main hero. But I agree with Preds.
In reality, I definitely wouldn't use the Moon faction, I'd use someone from the Fury, Ignis, or Moner factions - I'd go down there.
That's exactly what I wanted to try, maybe I'm being too cautious.