I don't think even the JP server has a legit XP farm. They have an Enderman farm which is kind of close, but a smoker farm would work way faster and those are in fact easy to make anyway. Someone just needs to pay the slightest bit of attention to some YT tutorials.
Here, any lurking ENs or managers, fucking look, you can't make this? Really?
https://www.youtube.com/watch?v=aT0my0PMvcE 