i wish i saw this when i was drunk last night maybe it would have made more sense
its not a terrible idea- needs tweaking and more details

I was drunk when I typed it out, thought I would remove the previous WALL of text and simplify it... did not work.
Was thinking, no one knows how hard it would be if EVERY wave was Evil Presence and you could NOT town, making it challenging.

Below comments are not arguements, they are just some points made at other comments... yup, maybe some more tweaking,
maybe it is too hard for any guild or players to do something like this.

@ Triple GPs: [If you start/re-start run mid level, you get normal GPs]
You start Halls of Evil at level 1 [solo or group] ... [Yes, vault is still accessible in maze]
You have to explore [just like maps now, can not spawn mobs by spinning and levelling up] ... Maybe this should be a Unique Map as mentioned before.
You have to use TD to make a new maze to spawn mobs to level up.

@ EP drops: [Maybe a reduction in normal items / increase Comfreys, Potions & Rods]
As it is now, they don't really drop anything great, and they don't drop whites anyway.

@ Grounds for MM Training
In MM, not every wave = EP... this would be more extreme to MM or any other objective in the game, can you imagine
coming across 4 consecutive waves of 7-9 EPs, then constant waves of 1-6 EPs.

Things I think it could help with...
economy [increase prices of gear/fish/glyphs etc], player base, competitions and
skillables for those people that spent endless hours getting higher ranks. oh, and profs...

Yes, it will most likely not get implemented at all, but so what, I like to see the views of others.

imo this idea would be farmed for gear and gps as stated by guilds with better gear than everyone else, making it "Unfair" for those who don't have the gear to do this.

Then maybe add difficulties level such as easy medium hard and extreme, i voted yes

No.

Not a fair opportunity for all and it won't increase player base and it'll just split up the game even more (some players will wanna try Hall of Evil while some won't - the player base is way too low for this).

What we really need is something that will capture new players' interest and keep them interested. I believe the reason this game is dead is because there's no way to progress without first buying gear. That's a huge turnoff.