I'm a LVL 90 Life Wizard and all the dungeons were really hard to get through because they take so long when you like to play solo. People today just don't have hours and hours to spend on one battle and you can't leave or you forfeit the battle!
We should be able to pause or quit and save our battle positions, not during a battle, of course, but in between floors and battles in one dungeon.
I am partially through Azteca and couldn't do it without hiring henchmen. I wanted to clear my quest log of those annoying optional quests that never go away, so I decided to tackle Waterworks, which I couldn't do at a lower level.
Well, guess what? I can't do it even at LVL 90! I spent three hours and many henchmen later to get to the end boss and die! I wasn't happy about that and I will not repeat it. It's not worth it. I won't go back and do the Helephant Tower, either.
Hard battles aren't the problem because everyone likes a challenge. It's the fact that you can't leave a dungeon and save your progress while you take care of things at home or work. You have to continue or start from the beginning. That's just not fair to everyone.
Golem Tower is hard at the lower levels. I usually wait a while before I try that tower. Build up health and mana, and get some strong spells. If you have a few crowns to spend, you could get a low level henchman to help you too.
And Prospector Zeke's quests are strange, but here is one link that gives some info on where to find his stuff:
The hardest quest for me has been The Trial of Spheres in Celestia. It has a lot of puzzles and really tough bosses.
Yeah, the Trial Of Spheres was tough... Too many puzzles. LOL. And those tons of fights you have to fight before the main boss... My brother saw that boss that said: "You have charmed your way into my heart." Then, he stuck his tongue out and said: "That's sick!" LOL
the first dungeon in krokotopia. I was always this close to finishing it, but then I had to log out. I must have tried about 17 times before I FINALLY managed to complete it in time. Dungeons are a lot easier for me now, though!
I'm surprised to say that Xibalba wasn't tough for me.
I actually think that the hardest dungeon is Kensington Park before it was shortened. It was a tiny bit tough for three level 80's. I think now that I have avenging fossil I can do it with my grandmaster life.