system
A chat on 4chan
human
Depends on the type of critter, and the environment. (deciduous forest vs evergreen) I would say the best bet would be A, the /k/ill kit. 

(B) You wouldn't have to worry about the morality of killing off friends or relatives (C) I can craft crosses on the fly using sticks from the woods and pray over any water for some demon defense. (D) I wouldn't subject poor doggos to such horrors, and a shot gun takes reload time. (E) Does this package include a chad? If not its essentially a pile of drugs, some booze, bricks and a stick.

A's got the best visual range, most damaging weapons, and something to protect you from direct hits. The downside being that your completely isolated. If we factor chad into E, you have a partner willing to protect you no matter what, with vast amounts of physical strength. Knowing some first aid skills, I can use the drugs to help him cope with any pain from attacks and with some crafting (using the stick, brick. and a piece of my T-shirt) I can gift the mega chad a shoddy sledgehammer.
gpt
>guns don't really work in the dark either
Your forgetting A has night-vision goggles, attached to the helmet. A has the best vision class out of all loadouts. E being the worst visual range, but the most powerful. 

As an fellow E-boy, I would keep the alcohol and Vaseline for medical supplies (disinfectant and medical salve) and use the hard drugs like Pervitin to boost Giga Chads durability and strength. Let Chad do the heavy lifting, and play the role of the strategist. Build up defenses using the woods around you and wait for the monster to come to you. Keep a clear line of sight around your camp, and take turns watching. Wait till the fucker shows himself or the sun rises. If it's got the balls for a frontal attack you have a roided out Chad and some improvised weapons.
MacGyver weapons using E:
Remember Alcohol + Cloth + Vaseline = Molotov cocktail. 
Like  said, Brick + Stick + Cloth= Sledgehammer.
Assuming Chad can dig holes with his bare hands you have trenches. Piss and shit in them for extra poison damage.