I literally cannot even fathom that such a thread even exists.
The Mad King’s tower is a completely optional part of the Halloween event; it’s not required for any achievements, and you don’t get anything “exclusive” from it. It’s meant to be challenging (oh no).
As for the Mad King Chest after killing him, there are no “jumping skills” required to get to it at all. It’s not difficult to find the path after a couple minutes, there are no close jumps at all. You are finding a way down; if you can’t be even bothered to spend some extra effort, you don’t deserve the chest.