Where are the spellcasters?

Hint 1 of 6:

Look around Dencamp-On-The-Teeth very thoroughly.

Hint 2 of 6:

Go to the south of Dencamp-On-The-Teeth.

Hint 3 of 6:

Make sure your equipment is 100%, and that your health is full.

Hint 4 of 6:

Save first.  This is a VERY dangerous battle.

Hint 5 of 6:

There will be a house with a well on the south side of the road.