Fom the ditch where the skellies roam, you can climb up the hill between the 2 gates, once in between go to the sw wall of the keep(+237.11, +5.44, -153.87)nd you can jump on to the wall where the wall juts down in the corrogated form(sorry dont know the name of this type of formation) you will not jump on top of the wall, but instead land on an invisie ledge, at this point you can jum on top, and jump on to the hill on the other side without having falling damage, and there you are, you are over.