This is probably the first true test of your party's flexibility in Metaphor: ReFantazio, as all of these bosses require different archetypes to be levelled up in order to defeat them. There are four mini-bosses you're going to have to fight during this quest, but you only actually have to fight three of them to complete it. If you find whichever boss you've opted to fight second truly insurmountable, then you can simply challenge whichever one you didn't challenge instead.
Before attempting...