I am planning on building an XP farm and I am wondering which route to choose.
I have the basic setup figured out, I am going to use gravity as main transportation. There will be a tunnel from where I am standing 30 blocks up. Above that the main spawning cubes will be.
To make this as simple as possible I want to just let them fall from above. 5 blocks above the ground I want to make a 4 high - 2 wide layer of water where mobs will fall in. I bet this will break their fall and they will reach the ground only with minor damage so there are easy to kill. To make the Enderman a little easier to kill I will have a crusher using sticky pistons on the 3the 3th block.
I am wondering if the Enderman will TP away when they reach the 4 high area of water, my main guess is that they will.
Else I would have to break the fall each 4 blocks or so. A lot more works as I would have to work with open trap doors and pistons.