PDA of a "Monolith" fighter

Using the Monolith sniper's PDA you brought him in Second sniper wanted, Fenrir found out that the Monolith will hold a meeting in Pripyat-1 Underpass soon. You should eliminate them.
== Walkthrough ==
You have to climb into one of the top rooms under the main dome in the Underpass, and grab Fenrir's stash with a Needlegun. You are not required to use it, if you don't want to.
After grabbing the stash, Fenrir messages you and tells you to move to the crane for the better view. As soon as you walk over it, a group of Monolithians appear. All of them are armored, and most carry 7.62x51mm weapons, so you'd better take cover quick.
Here's the full route to the top.
One of the Monolithians will have the required PDA on him. Take it and bring it to Fenrir. He tells you that you'll have to postpone the counter-sniper extermination for now, as Prime is injured. You need to talk to him.
== Notes ==
* Pre-placing a tanky mutant embryo like a Librarian on the ground floor can help take the heat off of you while you get into position. It will die relatively quickly, but will let you pick off several enemies targeting it before it dies.
== Bugs ==