There are some games where if you don’t do the side quests, you find yourself under leveled and struggling. Happened to me in Witcher 2 even though I thought I had completed all of the side quests in an area. Had to go back to the previous area and grind some more.
An older reference, but a meritorious one. We will need to delve deeper into this dungeon to determine how you master it. Perhaps there’s a tome of rules to guide our journey into this pursuit.