A bit frustrated trying to find Skyshard (4), On the lip of the Skybridge?
There are two elevators up to the Skybridge. The easiest and closest is one in the south part of the Rector District (Western Area) of the Brass Fortress.
Note:
The path to the skyshard may require some escaping, evading and/or combat. There are mobs guarding the Skyshard. You will need to be able to clear the area before using the skyshard.