Octopath Traveler 2 - Quicksand Gaol

This is another optional dungeon, but if you want to unlock all of the licenses for the subjobs, you need to come here for one of the Hunter licenses. The place is practically a bowl shape where the boss is waiting at the bottom and you can rush straight there and loot, sweep from one side to another, or pick it off last.

As for the worm, Warriors can make extremely short work of it, but I did not know to bring one with. By spamming their triple hit sword move, you can shred its shield and then go to town. The next best thing I could have done was to use HP Thief with the Thieves to at least double tap it, but you will burn through their SP pools really quickly.

Basically, what I'm just getting at is that I did not have the proper set up to obliterate the boss, and if you are having trouble there is a lot to fall back on. I am going into these blind, and had I known what to expect, this could have been an extremely ugly fight, but in a different direction.