I see many threads where people are complaining there isn't enough challenge in the game.
What if we had a single arena type quest (or a few that rotate each month) that has only EE settings from level 20 to 200. Each month we would have a contest to see what party could achieve the highest level with ties going to the team with the fastest time. It would be considered a 6-man raid so no spirit cakes or hirelings. The devs wouldn't worry about Dc, hp, damage etc. as the level got higher -it's meant to be really hard.
There can be only one ... across servers.
The winning team each month would get a special victory box with the following:
1) highest tome in the game - random stat - unbound
2) random iitem from the highest level raids in the game
3) TP
4) some other goodies
Or more like a raiders box where you can choose from the best raid items / +6 tomes.
There can also be a random loot chest and/or end reward just for completing. Maybe even some ingredients based on quest level that can be used to craft a few unique items.
For the most part i don't think fine-tuning EE perfectly is possible, but this would give people something to shoot for and even people that aren't interested in the competitive aspect can use this as an extreme challenge.