A Plague of Demons

Monster(s): Ghouls (knife, guns); IR Demon (guns); Banshee (Blue crystal); Ooz (guns)

Saving Zone(s): 
NE corner
NW (on the other side, go S first) of central ladder

Ladder(s): 
Around NW corner: down to Beware of Low-flying Nightmares!
center: up to Feel the Power!

Objectives:
Silver Door: near SE corner
Cedar Box: behind Silver Door
Dead American Soldier: N of central ladder
IR goggles: with the Dead American Soldier

Problem(s): Invisible Demons
Solution(s): IR goggles