Act 5: C4 - Tenuous Footing

Head down to the crane, ignore the longshot, and get in. You use the LS to raise and lower it as well as turn. Just move it left, lower it, get Dom on it, then lower him on the flat roof below you. Then get out and use the hammer on the enemies all around. Take the crane over and help him clear the place out, using the hammer and lancer; the hammer needs a clear shot, FYI to why it won't hit anywhere.

Get on the lower roof where a mauler comes from the right, so hammer it, then a reaver on a roof to the left (put the laser right on it). Head down the ramp and kill a flamer and some tickers, then one guard. Head to the roof for a few more tickers, then get on the bridge thing and you could just use the hammer as the drones try to rappel up. If a hook is on the railing, you can hit them and when there are three hooks you can still get all three by moving the laser around. Pretty simple. Step on the roof after and it will fall.

Take cover at the windows and be ready to toss a frag at a flamer and company. If your frag took out the furniture, get over and grab the final item, a journal in the corner. Stay in this corner and shoot the enemies on the other roof, then get over there and collect any ammo. Then cut some cables holding up a tower and use the hammer on the enemies at the other end. Cross over to fall down.

Use the hammer on the kantus and rappelers around the corner. Get in and then a Brumak attacks, but you cannot attack back. Just stay low and it will play out. Then follow Dom to a door and press the button to get through. It's a surprisingly calm ride up a burning, fallen building. Get out and run across the line of fire. Follow the path and kill the guy who is apparently the pilot of that thing.