this method is for below 1.16 and may need slight adaptions depending on ur version
for 1.16 and up bring a boat to trap enderman in the nether warped forest biome
Why search them?
For pearls of course to make eyes of ender to find the stronghold to get into the end.
After you have acces to the end it gets really easy.
This makes it expensive to build a special farm for it because you only need tops 12 pearls.
But what to do in the meantime?
But why are they so hard to find in the overworld in the first place?
Because most mobs spawn in caves and otherwise spread out and theres like a ~1% chance of a mob being an enderman.
The old way is to run around at night untill rng grants you enough endermen.
So to find endermen fast you need to find hundreds of mobs fast.
To do that i have the folowing much faster solution:
Step1 find some decently flat area.
Step2 build a slightly taller then 128blocks pillar.
Step3 pour water to one side.
optional but recommended: turn the water stream into a water elevator to get back up quickly.
USE AT NIGHTTIME
Now when you are on top of it all monsters will despawn.(f3 check lefttop e:nr to c how many entities there are should be 0+ passive mobs in the area)
Then slowly go 20blocks down. (f3 wait till entities amount goes up ~75)
Then descend. (can setup the waterstream so you can jump down instantly)
And tada 75 mobs very close to where you are.
Kill the enderman you find and repeat going back up and down untill you have enough enderpearls. (this method can also be used to find zombie villagers to start a villager farm anywhere)
See attachments for pictures of what to build including my killing spot for enderman.
plz leave a comment to tell if this was usefull