During my side quests for the secret jobs, I started it by acquiring the sorcerer job in Octopath Traveler. But the boss fight is not that easy compared to Winnehild but if you know the pattern, there is nothing to worry about
Boss: Dreisang
Location: Shrine of the Archmagus
HP: 171,469
Shield: 4-19
Gold: 20,000
EXP: 2,000
JP: 1,200
Item: Refreshing Jam
Weak:
Dreisang will start of with 4 shields and 5 weaknesses, but increases by 2 after recovering from a break, until it reaches the total of 10 shields. Weaknesses also change afrer recovery from breaks.
Dreisang’s attacks are mostly elemental so let the Dancer cast Sealticge Seduction on a Cleric then the Cleric will cast Reflective veil to the party. Please keep in mind that Dreisang must be put on break on the first turn so the breaker’s speed must be high (have a warrior in your party with a Thousand spears).
Once your party is been buffed with reflect status, let Dreisang damage himself. Break him before he uses Divine Majesty again when his HP reaches 25%.
Spam Sealticge Seduction and Reflective veil until Dreisang is dead.