@C0ND1T10NR3D This was done on the live servers. Like I wrote, this took roughly 1.5 week to set up, including mining, manually placing 600 blocks in each crafting table, then spam-clicking about 1500ish tables 30 times. Took me 4 hrs 10 minutes of pure clicking.
The reason it works is that I gad long rows of crafting tables, 5 wide and like 80ish blocks long. In between all rows I hade a 4 block gap with a wall to stop me from going too close to the tables I previously mass crafted at. This prevented me from triggering the xp drop, since you get the xp when you go withing 3-4 blocks of it OR someone else triggers the tables. When I finished up the last tables, I are teaching pie and logged off for the night. Next morning I just ran through the entire thing. I got video footage of me running through. However, it was important that I ate the pie before logging out, because so.e of my refinery xp was triggered by someone else while I was offline.
This is not the first time I have done high numbers, done 5-7m in the past. I know @Vansten did a 7m+ one once, so I wanted to top it and I did 