Blazes are the for XP in 1.7.10. Why? They give more XP than zombies/skeletons, and their drops (blaze rods) fuel your enchanting.
Because the water cannot push them off unless they wander; the piston clock forces them into the water. This is "semi-automatic," but it generates roughly .
If you haven't found a spawner, build a large dark room high in the sky (usually above Y=128). Minecraft: How To Build An XP Farm - DualShockers
If you stumble upon a Zombie or Skeleton dungeon while mining, you can easily convert it into a safe, localized XP farm using water elevators. How it Works minecraft 1.7.10 xp farm
Tips:
Endermen will attack the mite, fall down a 43-block drop, and be left with 1 HP. Kill Area: Position yourself to hit them for instant XP.
Place water along one wall so it pushes mobs toward a 2x2 hole in the corner. Blazes are the for XP in 1
In this version, building an requires understanding old-school spawn mechanics, fall damage, and player positioning.
: Throw Ender Pearls on the top of the shaft until an Endermite spawns. Name it with a name tag so it never despawns, and push it into a minecart directly over the center of the pit.
Trap an Endermite in a minecart directly above the center hole. Endermen will aggressively sprint toward it and fall down the chute instantly. 2. The Classic Mob Drop Tower (Best Early-to-Mid Game) Because the water cannot push them off unless
In the center of the 32x32 platform, dig a 2x2 hole. Drop down 44 blocks (This brings Endermen to 1 heart). At the bottom, put a 2x2 room with a 1 block high entrance (so you can hit their legs).
: Let the mobs slide forward and drop 22 blocks down. This softens them up significantly so you can kill them with a stone sword or bare hands. Blaze Farms (The Best Mid-Game Nether Method)