This is discussion archived from a time before the current discussion method was installed.
: I'm not sure on my info since it's been a while, but shouldn't the Lufia dungeon - or at least the Lufia 2 version - be noted as to its special property of not affecting your character stats? This makes it a fun side quest with potentially very good loot but not useful in terms of leveling etc.
Durlag's Tower was the entire point of the first expansion. Watcher's Keep was about half the content of the second. They'd have been bonus dungeons if they were released with the original games, but they weren't.