IMPORTANT: In 1.18.2+, the subchunk position is shown in brackets to the right of the player block location. https://imgur.com/uihUBAT

A very practical stacking raid farm that's about 20 times faster than a witch hut in Java 1.18+ and provides far more emeralds than you will ever need. Easy and quick to build in early game, made from accessible materials, lava cast for build efficiency, lag tolerant, flexible clicking automation, and relatively safe to operate.
* For 1.16, see https://www.youtube.com/watch?v=WUclcl_AnIo

RATES (Hard Difficulty):
128k total drops/hr
43k witch drops/hr, including 5300 redstone dust and 5300 gunpowder/hr
56k emeralds/hr
If using a client side autoclicker, the farm will throttle itself if there is server lag, which may lower the rates. These reported rates assume that every drop is collected in hard difficulty, but the sorting system in the tutorial loses about 2.8% of witch drops, and 18% of emeralds. Additional filters can be added for better yield.

Discord: https://discord.gg/G9aa2YTTQX
WDL: https://tinyurl.com/ysf4vdah
Litematica to match WDL: https://tinyurl.com/mr3ze5vh
With minor optimizations not shown in tutorial:
https://tinyurl.com/ys4psm5z

0:00 Intro
0:38 Material List, plus 5 villagers
1:35 References
1:50 Mechanics
9:43 Tutorial, READ VIDEO DESCRIPTION
30:27 Instructions for Use
32:06 Raid Captain Bank
33:21 Timer for manual clicking

NOTES
0:38 Don't use flammable temporary blocks near lava. FORGE may allow scaffolding to catch fire from lava, which is not vanilla behavior. The workaround is to pillar and bridge using other materials instead.
1:05 Carpet mod, Tweakeroo, or any autoclicker or macro program will work.
1:19 Client side autoclickers are perceived to be clicking faster by a lagging server, and this farm operates less efficiently at faster (and slower) attack intervals.
5:00 Ravager jockeys rise to within the 112 block radius, which pauses the spawning of raid mobs at wave 5 until the ravager dies. This helps distribute the raid captains so that they don't appear all at around the same time, which helps accelerate the farm in the beginning.
9:43 In 1.18.2+, the subchunk position is shown in brackets to the right of the player block location.
14:14 You will need to add extra chests to the storage system. A double chest will fill up with emeralds in a matter of minutes. You will need 2 hoppers to pull from the chest because it is filled at 2x speed.
22:30 It may be beneficial to put the villager inside the composter to ensure better alignment for the fall.
29:45 A severe lag spike can cause the armor stand to break. Keep the farm running by dispensing multiple armor stands at one time.
30:00 The junk items that pad the 2 hoppers must be different from each other.
30:30 It's normal for the raid bar to disappear, as the pressure plate shifts the raid center away.
30:41 It will take a few minutes for the farm to warm up; just keep attacking the armor stand.
30:47 Your sword should not have fire aspect.
32:28 Drive the boat backwards until it does not go any further. See notes for the raid captain bank below.
33:37 The last repeater is set to 3 redstone tick delay.

MECHANICS:
youtu.be/COxEcP-wKj0
youtu.be/oTC3RoPLogk

RAID CAPTAIN BANK
A captain is the first mob to spawn in a wave, and is thus picked up first by the boat. After killing BOTH the captain and passenger, crouch down and push the boat back against the trapdoor so that the bank will work properly next time. In 1.19+, use a boat with chest instead of a plain boat so it captures only a single mob. Thanks to Bread for this design. Tap the pressure plate several times when you are finished using the farm so that mobs on the upper shifting floor do not persist when you leave.
And thanks to MadMan25, for the idea to use an amethyst cluster so you don't need to push the boat back after each use:
https://tinyurl.com/2p9ftcbw

The farm may not work perfectly on MODIFIED SERVERS and may require adjustments to server settings. The farm may crash when using OPTIFINE. On PAPER SERVERS, ravager jockeys can glitch through the upper chamber, so you'll need to modify it. If armor-stands-tick is disabled, you'll also need to adjust the farm to use sweeping edge on a minecart instead. Both adjustments are represented in these files (Thanks to Hard):
https://tinyurl.com/p4wamdfz
https://tinyurl.com/2p8m7w39
Or follow these video tutorials (Thanks to Nash):
youtu.be/H4Nx1EF9BH4
youtu.be/U44GkhLGpuw
There are also other server settings that might impact the farm. Stop by my discord for more information if you have trouble.

A RAID PROPAGATION BUG sometimes occurs where the chain of raids is lost without further propagation of new raids. Try resetting the composter at Y224. Place a sticky piston directly underneath this composter, facing up. Activate the sticky piston with a button to get the villager to re-associate with the composter.
https://www.mediafire.com/view/rnunc233d8ghbib/POI_reset.png/file