Keep moving forward through the flames and pry open the door at the end of the corridor.
Follow the path towards the fallen debris. There's a small gap that you can use to get to the other side.
Keep going through the corridors and don't bother with the Salarii. They'll just automatically get killed by explosions.
Head out through the hole in the left wall and make your way around the roof and towards the building on the left. Use your climbing axe to climb the wall.
Shimmy over to the left side and a guy will fall over. Press up and jump up towards the beam that's right above your head.
Head across the bridge and inside the room. Look to the left and you'll find a hole in the wall. Go inside and a cutscene will play.
After the cutscene follow the Salarii around the corner of the roof and use the zip line to get down towards the next roof.
Go left and hide behind the wall. The Salarii will attempt to keep you from getting to Sam. Kill them then proceed towards the building that they're standing on.
Go inside the shrine and you'll find Whitman. That annoying bastard. A cutscene will also play.
After the cutscene you'll regain your weapons and you'll also have to fight a horde of Salarii. Equip your machinegun and shoot down the guy in front of you, then roll to the left side and hide behind the pillar.
Start killing off the Salarii from behind the mini altar. Make sure to roll away when they throw a dynamite at you.
Two heavily armored Salarii will come out after you kill enough of them.
The guy with a spear is easy to take care of. Just dodge his attack and counter him thrice to bring him down.
As for the guy with a machinegun, keep shooting at his head until his helmet shatters and you're able to land a blow on him.
After you kill the two of them head for the spotlight at the left side of the shrine. The exit is in there.
You'll be attacked by a group of Salarii around the first corner. Hide behind the wall and kill them off one by one. Use your fire arrow for faster crowd control.
Go down the stairs and more Salarii will come at you. Shoot down the one with a gun and wait for the spearman to come near you. Dodge his attack and kill him once he does.
Below the stairs even more Salarii will come and attack you. Shoot down all of them before the one with a shield gets close. When he gets close dodge him and counter to instantly kill him.