You can get right up on him if you stand behind a wall and wait until he reloads, then you can run up on him and put a few rounds in him. Also, watch out for the poison gas grenades he throws.
This is what weponds you must use to destroy the monsters and save up your ammo....
1.Zombies (Brown looking):
Electric Buz saw
2.Crying leaches (Brown looking):
3.Half bodied monster:
6.Zombies (Tan looking):
7.Crying Leaches (Green):
8.Flying Crown Head (Brown tounge):
9.Flying Crown Head (Green tounge):
The Machinegun and sniper can be used to kill all the kind of monster
Well I hope that helps you survive the Ward and deafeat the monsters
You can end up having the scope of the sniper rifle on any gun you have. When you are out of ammo on the sniper rifle select it and start shooting (yes even though there is no ammo shoot). While doing so select another gun while shooting and the scope will go on that gun too. It is only temporary though if you want the scope on the guns all the time you will have to keep re doing this process.
If you accidentally select the night stick or flashlight you will not have a scope obviously, what you will see is a black screen with the 4 sides of the screen visible. And also to get out of the scope on any gun just select the sniper again and exit out as you would any other time.