Octopath Traveler 2 - Lost Isle (Arcanist)

I've neglected the ship for a bit too long and decide to take to the seas. There is a boss to the east and the west, and I opted to go east since I could see the fight from where I started. Smashing down the Scourge of the Sea (for the first time), I go past it to see what it was guarding and end up with one of the secret jobs added to my arsenal. Sadly, I've yet to find a place with comparable EXP to what I got at best here on the island...