Cross the Bridge
Make a zip line from the trebuchet platform down to the rooftops, and use the only path you can take to create additional Ropes to get back to the central city. The second zip line takes you to an ice wall. Hang from there and get over toward the handholds to your right.
Climb onto the building and sprint over the rooftops as you try to get back to the second gate. Archers seem to be everywhere. Take out the ones in front of you with close-range weapons, and then use your Rifle or Bow to kill the guys on your flank. They’re farther away but are still very snipable.
Make a zip line on the last rooftop and slide toward the plaza below. You land in the upper tier of the building that overlooks the square.
Cross the plaza and walk triumphantly onto the bridge beyond. Yes, the bridge decides to collapse at that exact moment. No, that’s not very fair for you. Worry about it later, and get moving now.
It’s dangerous to jump early during your bridge crossing. The action is extremely intense, the area is somewhat dark, and you can misjudge your timings. Do what you can to wait until the last moment before making each jump so that you don’t fall short. Sprint the entire way. That should go without saying.
At the end of the bridge, jump and grapple so that you make it to the other side. Climb up the rope to the top and get your weapons back out, because the Deathless won’t give you a single moment’s respite. They’re coming.