Built an enderman farm in main world close to my base. Need advice

So I built an Enderman farm in the regular world, close to my base at the top of a mountain. The very top of the structure where the Endermen should spawn is

A Space Station I built in my Survival World to cover up my Enderman Farm. The rates could be better, but it does look nice doesn't it? Tell me what you think

The farther you go from land the fewer Enderman can spawn. I don't know how to get better rates, and be away from large spawnable areas. How far out should I build

The Enderman Farm, SMPEarth Wiki

Make your base Enderman - Proof!

Yeah ok so my enderman farm is kinda OP : r/Minecraft

Enderman XP farm I made! Got the design by iJevin, but I wanted to add flair and match the End + enderman aesthetic. Still have some detailing to do (and likely some

The EASY Enderman Farm! Let's Play Minecraft Survival

How to build enderman farm on #minecraft? #mojang #minecraftbuilding #

Enderman Farm - RTGame Wiki