There's a small spot to the west of the bombs that is safe if you hug the wall. This is only during the day though, a skelly will roam there at night. If you stand too close to the cliff, the orcs can aggro from the bottom.
Edit: This is for something like a nuke/sleep thing though. For smn soloing them, I wouldn't suggest that spot for a kill, but rather to invis up and pull it back to the hill.
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