Do not attempt to climb the second step immediately following the first. Instead, use Torrent to double leap across the gap in the arched path on Elden Ring Runes the right. Climb the ladder at the end of this route instead.
Go left from the highest point of the ladder and continue to follow the path across the tower. Use Torrent's double jump to cross any gaps making sure to be aware of many that are hard to discern. There's a spot of grace at the top of the path.
The stairs in the north of site of grace leads towards the point of activation of the Radahn's Great Rune. For the Godslayer's Greatsword take a turn to the south and go down the stairs. Be on the lookout at two Redmane soldiers near the bottom. The other is at the corner.
What is next is the result of a FromSoft favorite that's nearly as famous as Miyazaki's adoration for poison swamps- the old "drop from ledge to ledge making your way to the bottom of a great pit" set piece. (See for instance the Great Hollow, Majula, and the Hunter's Workshop). The trail is quite straightforward the first step is the cage elevator that has a Redmane soldier guarding it, located just to the right of the starting point. The strut that is cracked in buy Elden Ring Items your path will break under the weight of you, but it's an event that is scripted, which means it's unlikely to cause any damage during falling, and this is the route you must follow.