Great Old One
I can see a bunch of ways it might make sense. "Back to back, old girl. I'll watch this side of the camp and you watch that side." or "She can pick up scents on the wind better than I can, so I focus on distance and color." Two beings cooperating in a way that is greater than the sum of their parts.
But that's basically it, it's not greater than the sum of their parts, if one watched one direction and the other in another direction.