OCTOPATH TRAVELER

This shrine is located in Western Wispermill flats in case anyone hasn't found it yet.

For anyone struggling with the bosses for these special secondary classes, I believe this strat (or very similar) can be incorporated into most of them, if not all.

For this one you will need a cleric and a dancer on your team, the other classes don't really matter although I used 2 scholars just for the increased break with 2 spells per turn. You will need the last skill for dancer which makes all buffs that target single allies target everyone for 3 turns.

Simply spend your first turn(s) using any BP items on the dancer to get them full BP, use the divine skill on the cleric and then spam reflective veil which reflects any elemental attacks back at the user, since that is all this boss uses if done correctly you will never take damage.

I spent the entire battle just spamming reflective veil with the cleric, let the dancer build up BP every turn to recast the divine skill where needed and then just kept attacking with my other 2 party members.