This unnecessarily long flashback ruins the pace in my opinion. Author should've finished the whole battle against the strong monsters first and leave the exposition to chapter 3.
This was a slightly confusing read when they were talking about high-tier monsters from lower floors of the dungeon and calling them lower-level monsters.
This was a slightly confusing read when they were talking about high-tier monsters from lower floors of the dungeon and calling them lower-level monsters.
But think of it as similar to the Orario dungeon in Danmachi. The closer to the surface floors, the weaker the monsters. Going further down the dungeon, monsters get more stronger/dangerous (in various ways).