Just realized, I didn't mention the boardsize
I would assume a 4x4 board is enough, one could also vary the terrain and use a bridge over a river near the camp to have a defensive position.
Another thing that I forgot to mention:
The Enuks are not allowed to move closer to any Devanu troops, as they are afraid of course.
You could also randomize the movement of the Enuks a bit. I would suggest that any player can activate them, so the Devanu-player would make it harder to catch them.
greets