In your opinion what was the best designed dungeon in the game?

[Jirah]

Its also the closest thing we have to Sycrus Tower (Hard) if it helps, especially considering that Raids never got that kind of remixing and that the trend ended with Stormblood.

Ehh Understandable as Hard modes are no longer a thing since the devs lean towards "glorified instanceses" rather than Unique dungoen desighn nowadays