Basket works alone on the record farm: skeletons shooting creepers through an obsidian kill chamber, a skeleton overflow drop, and a water-washed spawning floor run by a hopper timer.
Team B.S. cure a zombie villager with a splash potion and a golden apple, push it up into the mob sorter, and switch the whole thing on for the first time.
Team B.S. need dogs for the mob sorter but own none, so they breed someone else's. Then comes a long railroad, a villager hunt, and a surprise about where dogs go.
Team B.S. borrow three of Evil_Mech_Meru's cats for the mob sorter. Getting them there means the Nether, a stubborn portal, and one cat that will not sit.
With the spider stage working, Team B.S. start the next part of the sorter: a villager, cats and dogs to split zombies from creepers and skeletons, and a floor of trapdoors to fool them.
The lava finally goes in under the sky farm, along with a simpler water layout. Then a zombie wanders into the spider side, and the lava's light raises doubts.
Team B.S. head underground with stacks of torches to light the caves under their farm, and come back up with a ravine lit, a pile of emeralds and 36 diamonds.
Team B.S. arrive on RainCloud with a plan for a record label, start an iron spawning platform in the sky, and find a gift under a tree that turns into two dirt houses.