User blog:Mathmagician/Wall of Flesh Solo Guide

Introduction
Hey everyone, Mathmagician here with a simple walkthrough on defeating the Wall of Flesh without the help of any friends or any Hard Mode gear. This guide demonstrates what I believe is the best way to approach this boss the very first time you fight him. Of course, this isn't the very first time I've fought him. But I will attempt to approach it as if it was.

Formulating A Strategy
The Wall of Flesh is essentially a huge vertical wall that travels in one direction across hell, pushing the player backwards and forcing an on-the-run type of battle. Because of this, the key concept in this battle is going to be horizontal movement.

Since hell is rather uneven, yet the best terrain for horizontal movement is a flat surface, it stands to reason that it would be a very wise idea to construct a long bridge across hell. If I'm able to move freely along this bridge, then I won't have to jump to avoid obstacles such as buildings or lava. This will allow me to more easily focus on running away from the boss and shooting him from a safe distance.

Building Material

 * For the building material, I chose to use Wood Platforms. Why? Because you can shoot through them. The Wall of Flesh spawns minions such as The Hungry and Leeches, which can burrow through blocks. It would be very nice to be able to kill them when they're below the bridge.

Equipment

 * In this picture, you can see that I've prepared by crafting 15 stacks of wood platforms for the bridge, which will be far more than enough. Additionally, I've brought Night's Edge for my melee weapon and the Phoenix Blaster for my ranged weapon.
 * Also, I've already acquired the full Molten Armor set, so I'm wearing that. In terms of accessories, the first 2 are the most important ones. I'm wearing the Obsidian Shield, which grants immunity to knockback as well as immunity to fire blocks, and the Spectre Boots, which grant the ability to fly and run.
 * I have some Obsidian Skin Potions for dealing with lava, plenty of healing potions, and a Magic Mirror to teleport home when necessary.

Time To Build

 * I'm just going to start at the bottom of my hellevator and build the bridge to the right. Mobs may spawn, but I can deal with them pretty easily with Night's Edge. One important thing that I'm on the lookout for is a Voodoo Demon, which will drop the Guide Voodoo Doll that I need to summon the Wall of Flesh. It's important not kill the Voodoo Demon when its flying over lava, because if the doll accidentally falls in the lava then the boss will be spawned prematurely.
 * It's not uncommon to run into obstacles while building the bridge, as the picture shows. Fortunately, I can just mine through them pretty easily with my Molten Pickaxe. Of course, Dynamite is another viable option as well.

Equipment

 * Well, I have finally finished constructing my bridge, after about 20 minutes. As you can see, I somehow encountered 5 voodoo demons, which is pretty amazing. I also made a quick trip back home to restock on supplies. I bought grenades, figured they might be useful...
 * There are really only 2 important things to mention. First, I have a defense rating of 39, which I achieved through Molten Armor and Reforging my accessories. I also have some Ironskin Potions, so I can boost my defense up to a whopping 47. Secondly, I now have a ton of Meteor Shots for ammo. Meteor shot is very important because it can pass through 1 enemy and hit the Wall of Flesh behind it.

Summon The Wall

 * When the Wall of Flesh is summoned, it will spawn just off the edge of the screen and being traveling towards the world spawn point at the center of the map. Because of this, it's important to stand at the end of the bridge which is furthest from the world spawn point.
 * Poor Guide, your sacrifice will be remembered. In case you were wondering, this is what the Wall of Flesh looks like. The Hungry are attached to him, and they tend to float out in front, trying to eat my face off.
 * Fortunately, I have meteor shots, so I can kill them and damage the wall simultaneously. All I need to do is stay far away, keep running and keep shooting. Even if I'm so far away that the Wall of Flesh itself is offscreen, as long as I aim perfectly horizontally I know that my meteor shots will pass through mobs and hit the Mouth.

2 Minutes In...

 * Wow, this is incredibly easy. In just over 2 minutes, I've killed all of The Hungry and brought the Wall of Flesh down to just 1265 hit points.
 * Observant readers will notice that since the fight began, my ammo count has dropped from 1483 to 1198, so I've only fired 285 shots.
 * Also, I've only used 1 health potion and my health is still fairly high. That's all thanks to my spiffy defense rating. I even walked into the Hungry to swing Night's Edge a few times, so I've taken my fair share of hits.

Victory

 * And that's it. Fun times. Recap: I only used 336 meteor shots, 2 health potions, and probably only about half of the length of my bridge. This is a case of massive over-preparation on my part. Well, at least I won, and that's all that counts. I'm kinda sad that I didn't use any grenades though.

TL;DR (Too Long; Didn't Read)
The Phoenix Blaster with Meteor Shots can easily defeat the Wall of Flesh. All you need to stay alive is a high defense rating, a few health potions and a bridge across the abyss.