Abandoned Mines - Second Fight in the Ruined Chancel with Shallow Pools

When you return to this area, 3 more soldiers have staked it out—one with a rifle, one with a shield and baton, and one throwing grenades from the ledge above the newly strung rope ladder. There are many places you can take cover and many objects you can craft and throw. Here's one strategy that worked for me: As soon as you emerge from the hole, run to the left toward the curved wall at the back of the room.

Hide behind the low stone wall...

...and shoot the guy with the rifle first. The man on the ledge can't see you here, and it will take a few moments for the one with the shield to lumber toward you.

Once the rifleman is dead, turn your attention to the man with the shield as he approaches along the right side of the shallow pool. Either hit him with a molotov; toss a smoke grenade and then, while he's choking, move around to the left and shoot him with a poison arrow; or wait for him to get close and use the dodge maneuver. Target him with any weapon.

Then, when he swings at you with his club, press B/C...

...to dodge out of the way. He'll lose his balance briefly, leaving him vulnerable to attack.

If you have the Dodge Counter skill, this triggers a QTE.

Wait for the the Melee button prompt and then press Y/F...

...to stab the bad guy with an arrow, destroying some of his armor. If you don't yet have this skill, there will be no button prompt. Instead just shoot him in the back or or hit him with your axe while he's open.

Due to his heavy armor, it will take a few successful dodges to bring him down. If necessary, move past him so he doesn't block you into a corner. Then turn to face him and repeat the dodge maneuver until he goes down and you see the Melee prompt above his head. Move in close...

...so the skull icon turns from red to white, and press Y/F to attack.

Tap X/E at the next prompt to finish him with a bow choke.

The last enemy is on the ledge above the rope ladder to the northeast. Move around to the opposite side of the room, near the hole where you climbed out of the tunnels, to get a clear shot.

Target him or the red fuel barrel next to him.

Boom! If he throws a grenade before you can kill him, move out of the way and try again. Once he falls, it's over.