the most annoying dungeon ever is the crypt maze

For me, the hardest part was Ahriman's lair, as the enemies just kept pwn3ing me (I guess that's appropriate, as I was level 65). I never fought Ahriman, as I accideantly replaced the save folder wth one with the god goodie.
After that came the lamp world, I had to body swerve past 75% of the battles just to survive.
The dreamworld was really easy, but I guess it's because I took the walkthrough's advice and thought Lars Lightning Storm, equipped Rhen with Sword of Might and gave Emili the red demon summon.
The toughest boss battle is EASILY Indra (The ice cavern boss). Her ice storm leaves my entire party with 100 health, and after that she does another one, easily wiping out my party.
The highlands were quite hard too, but after going through the 10 times easier lowlands (literally), there was no problem.
Mt. Orion, it was hard until I realised you can use lightning scrolls.

my hardest moment was when i got poisoned and i had no marsh tea so i had to have lars heal rhen every three minutes from the bottom of wildwoods all the way to Shadowood Academy.

But mt orion was hard too.

My hardest moment for me was when I was at the Ahriman's Lair... it's too hard to defeat the enemies... even if I use Sword of Shadow spells and I am level 95. I was stuck and I have only little medicines/supplies to cure my party. I want to go back to the Stronghold Temple, but bunches of enemies blocking me...I am really stuck...
I was at the Dreamworld to get the Dreamer's Tear. The enemies are so hard, and Agas... he's so hard to defeat...
Mt. Orion??? You died 50 times?? XD if you want to go explore Mt. Orion, better you use both Rhen, Lars and Elini at the active party, if Rhen is alone, she is not strong enough to defeat the enemies.

(Note: I have version 1)
My hardest moment?
The first time I had ever played. I had JUST givin the snow queen her flower, and was ready to exsplore. After the first encounter with the ice slimes, I was almost dead. The only character with good armor/weapon/level I had left was Tei'jal, and if she didn't have soul strength I would have been dead! So, I used a Sedona traveling rune. Why was that my hardest moment? BECAUSE BOTH OF THE BOATS I HAD ACESS TO WERE ON THE NOTHERN ISLE! It took me like, a month before I could continue rescuing druids, thanks to the skudder.
That, or fighting Ahriman. It took me 7 tries.

LoL starwolvz. Mt.Orion was easy(I loved training @ Land's End), but Ahriman's Lair and Castle were the hardest. If an area is too heard 4 me when I get there, I just level up and train like mad in the previous area. Or upgrade equipment, if I have enough gp and not using cash cow or goodies.

well Ahrimans lair is the hardest for sure

The hardest moment for me was the banshee cave.
Because I went there in 25 lvl, and I was really tired of beating the monsters. About Mt. Orion -
it wasn't too hard. First you need to equip flood orb, and choose Lars to be Necromanser. Then add Elini, and for Rhen take the hardest skills from the school.

Ahrimans lair is brutal I beat the whole game at level 75 which isnt easy for me anyways.Ahriman himself isnt tough its just getting past the wyverns to get to him that is the tricky part.And I am not a fan of lamp land either that is a mean place as well

Ahriman's hideous lair gave me the creeps during the first time I played the game(a year ago which is why I nearly forgot how to play it). All of the creatures in that place always targeted Te'ijal until I got sooo annoyed and decided to switch to Pirate John instead.

i think the hardest moment for me would have to be mt. orion, i only had rhen and lars, but arhimans lair and dreamland were also difficult, at first i also found the wild woods hard, but i was only level 10 then, so ya, but it wasn't that difficult the second time around

Definitely Ahriman's Lair. >< Fighting Ahriman was actually a relief for me after all those Wyverns and Angels of Death. None of the other Aveyond games had such hard end-boss bodyguards. I needed 5 minutes to kill one Angel of Death.

my hardest is, when I first played the game, I didn't beat zaric or anything, and the highlands were pretty hard. also lampland.

The hardest for me is Ahriman's Lair - or that part of the lair right after the Stronghold Temple's door. The Wyverns are deathly hard XD. I actually have to thank my slight item-hoarding obsession (I always have a stash of recovery items) to survive every encounter. A friend of mine also has a difficult time with that place XD

Mt. Orion was more of wearying trip, since it's so...long...and populated with too many enemies. I remember this room which is like a...node...for various other rooms, and every time I have to return to it I have to sweep it clean of monsters (which happened like...5 times at minimum) XP Lampland was also the same for me. XD

Fighting Ahriman is a total pain in the ass. Cuz Levelling ups takes a lot of time when you're over level 60 time for the final battle, my characters' levels aren't even 70 yet

I would say Ahriman is the hardest, ive been using a 5 minute trial so it makes it even harder, I want to use Dameon, but he is at level 23 so, bad idea, anyway, i will have to be satisfied with only getting to the place where he is, not finishing the game....

Or you could buy the game *raises eyebrows*

I didn't get stucked in the Dreamland (not using goodies).
I even dodge a group of 4 Monsters in Ahriman's Lair
I really got stucked on Lamp Land, i have no cassia leaves left

The fight against ahriman was the hardest moment for me. It probably took me 6 or 7 attempts before I managed to beat him. He has the ability to wipe out the whole party. Luckily on my last attempt he healed quite often so he didn't use anihilate on me.