Inside the spawn area, turn around. Go right in front of the big elven statue.

After the first dropdown, proceed through the elven structure.

From the location of Skaven Marking #2, cross the stream to the right side and backtrack up the hill, past the first tome. Inside the first Elven Tower.

From the location of Skaven Marking #2, proceed through the narrow ravine, then keep right. Next to the ammo box on the upper right side.

After going through the second Elven Tower, at the bridge.

After dropping down into the dried lake section, keep to the far left.

From the location of Skaven Marking #6, drop down. Keep to the right until you reach a wooden, tower-like Skaven structure.

Not too far from the location of Skaven Marking #7, there is a way to get up. Proceed over the top. Next to the first grimoire.

From the location of Skaven Marking #8, go back and turn right. Drop down, behind the rock.

From the location of Skaven Marking #9, backtrack all the way around the plateau with Skaven Marking #8 to the other side.

Proceed into the next area. In the middle of the wide open plateau, next to a wooden structure.

From the location of Skaven Marking #11, keep to the left and drop down. In the side area where you can destroy the bell.

Proceed downwards into the ravine section.

At the end of the ravine section, move up and cross the chasm. At the dropdown where you would end up after having picked up the third tome, turn right.

An explosive barrel is needed to access this Skaven Marking: There is a guaranteed barrel spawn very close by but since this can also drop a fire barrel, better be safe and bring an explosive one from a previous map section. Put the barrel into the highlighted spot in order to lower the drawbridge. Take the elevator down and proceed all the way to the other side of the chasm. Next to the third Elven Tower.

(1) In the final event area. Once the event is started, a way opens up on the right side. Go there and proceed past the first crystal you can re-align. (2) After a short jump puzzle.