To let you know no i am not copying Snocrash so let me explain first.

I wanted to make a gold farm that doesn't use complicated redstone to use but to be still as good as a normal gold farm. I watched Snocrash video about his gold farm and it's very good farm and you don't do anything you just stand there and xp comes to you but because this farm broke in a update Xisuma made it better but when i saw his design it was very complicated for me so with that i wanted to make my own design.

Now let's take a look at this farm as you can see it's a circle type as Snocrash farm but it has only 1 circle. This farm it dosn't use any redstone if you would like you could only have hoppers and chests and that's all the only redstone you can add is the item sorters and a droper to get rid of the swords that's it that's all the redstone. Now i wanted to make this farm because of the looting effect with a sword that has mending, unbreaking, looting and sharpness(i will explain why not smite later) you can just stand there and kill them and get more items.

When i build farm that use the player standing there and kill the mobs most of the times i have a program that will click for me so i can leave the pc and go do something else. The program i use is OP Auto Clicker it's very easy to use and if you build this farm or download it to see it try this program to and set it to 1 click at 6 or 7 seconds.

Now for the problems every farm has problems nothing is perfect.

The HUGE problem that i discovered while i was afc on this farm on my server what the Reinforcement Chance. What this does is that when a zombie spawn it has a change to have this Reinforcement Chance on him and when it takes damage it will spawn zombies around it. Normaly all zombies have this option exept from the pigmans i think that's a bug that they are working on it. So the problem is that when you hit a pigman that has the Reinforcement Chance normal zombies will spawn around him. The zombies will eventually see you and go in the hole with the pigmans so it's not a prety big problem but because zombies spawn with armor is what the real problem is. On this farm i added my infinite carped duplicator to smelt the swords from the pigmans but when the zombies started spawn that broke so unfortunately i had to put a dropper to drop the items on lava.

The second problem isn't a big one it will happen on every farm you build in the nether magma cubes will spawn. Now to get rid of them you can put iron golems on a block around this farm and some times the magma cubes will see the golems and go to them but because they are not smart they will fall and die.

The third and last problem is the sword. I tested the farm many times with all swords(except golden gold tools are the worst) and the best is to use ether a diamond or an iron sword with these enchantments: Mending, Unbreaking 3, Sweeping Edge 3, Looting 3, (Sharpness 5). This farm needs you to be alone at the nether but what if a player comes to the nether to get to another location then the pigmans spawn around him and not on you now so if you have a smite 5 you kill the pigmans very fast and there is a chanse that they will stop coming to you. So i think that you can have a sword with ether Sharpness or not so you can still kill them but not so fast to make them not come to you.

I downloaded the OP Auto Clicker from here https://sourceforge.net/projects/orphamielautoclicker/
but if you think that this page isn't safe you can try to search it on ather pages.

Snocrash's Farm: https://www.youtube.com/watch?v=jQWG9Q7HoUA&t=225s

Xisuma's Expansion of this Farm: https://www.youtube.com/watch?v=dFtTOrcapgc

1 last thing for the people that don't know you can create a void world with the biome Hell or as we know it Nether here is the link from the page that i created this world: http://minecraft.tools/en/flat.php