What is the best map at LHC in terms of EXP per Monster?

I guess you didn't try out every map. How are you going to say Tall Castle Walls 1 with 4 Castle Golems, is better than Very Tall Castle Walls with 7 Castle Golems?

4? Have you ever been there?

There's 5 right there being blown up. 1 in the bottom platform. 2 in the bottom right. That's 8.

The notepad with the number of spawn was just a kept note pre-patch to see how many spawns are and to see how accurate it is.