The entire snake temple/dungeon comes to mind.
The Baphomet Megalith was one of the high points for me. Because of how the game opens up at that point, it depends when you explore the content. It was indeed a slog, but that is how our party endured and grew stronger. It is interesting, as some people claim the game gets easier as you go on, but this dungeon was a true challenge, a fight for survival. Gaining every inch of ground was an accomplishment, and I enjoyed the puzzles as well as the new tiles sets used for this location. The boss encounter was also memorable.
Wut, it was the easiest dungeon in the game, because IIRC has 0 instakills/gear destroying etc. enemies (or at least I didn't notice any)
Naga fighters absolutely have insta-kill capability, which makes them a threat.
Gorgon was the second tablet I went after, meaning it was relatively early in the game for our party. It definitely was a challenge.
I did Waterport/Lochs areas first, and had already maxed lethal blow + had very high speed on most of my chars, so maybe that's the difference. Never even noticed Naga fighters being capable of instakills, maybe their speed just sucks enough that they never actually got the chance to do it to me. I'm 100% sure none of my chars died even once during the whole Megalith run.
Still, as I said, combat wasn't the only problem, the amount of it and overall the dungeon feeling pretty meh and uninspired was the bigger issue. Like, the "pull the chain to close the pit somewhere, to find another chain to close another pit, to find another chain to close another pit..." thing was fun for some time on the first floor where I encountered it, but after like 3 floors of doing it on every step, it was just tiring. Actually was there any other puzzle or interesting mechanic in the whole dungeon? I remember nothing but pulling chains and fastforwarding fights for hours. Oh, and I think there also was an absolutely pointless "puzzle", or more like a fetchquest, with statuettes and pedestals.
Idk, I was just super hyped going into Megalith, it looked cool as hell from the outside, but at the end I felt nothing but disappointment and actually dropped the game for like 2 days. Whole thing just felt bad.
Some other sections, like Pyramid or Skulheim for example, which I did later, were also super easy for my party, but I remember them fondly and enjoyed the shit out of them. 95% of the game was pure goodness, while Megalith is just an absolutely boring slog in my memory, and I would rather get waterboarded than replay it. Only part of the game, where I had to force myself to push through and didn't find anything enjoyable about it.
