I've adapted and decorated IanXOFour's Guardian Farm design into three seperate builds: the house from Up (2009), a rafted boathouse, and a nether airship. The farm is currently tested to work on 1.16-1.20+ and generates about 180,000 XP per hour (with 41k shards + 16.5k crystals per hour). The farm is also early-game no-elytra friendly: it releases down a water-column when the player shoots up at the trapdoor.

I've included the relevant schematics in the downloadable .zip folder. IanXOFour's original design for the farm is available here: https://youtu.be/dfwsIpmOwd4 , I recommend watching the video if you plan to build the farm.

Thank you all, please let me know if I can include any additional files to help make the build process easier.