Metaphor: ReFantazio features a job system referred to as Archetypes, which allows you to swap any of your party members to any Archetype pretty freely. While there are some requirements to use the advanced Archetypes, you will want to swap out Archetypes frequently. In some cases, like certain side dungeons, there are specific Archetypes that will be recommended based on the enemy weaknesses found there, but you can also ignore that if you like your setup. One of the most important factors for determining your team composition is the synthesis abilities that become available when you have specific Archetypes present in your party.

Mage with Seeker, Healer, or Mage

The Mage Archetype tree is incredibly powerful, especially early on, since it has access to fire, ice, and electric attacks, which allows you to target a variety of enemy weaknesses. However, the abilities the Mage and its advanced versions can use only targets a single enemy. If you want to use a version that can target all enemies at once, you will need to use the Synthesis version of these abilities, which only becomes available if you have another Mage, a Seeker, or a Healer present. Of those three options, the best to go with is the Healer since the Healer gets to use a light damage attack that targets all enemies if a Mage is present.

Knight with back row damage dealers

The Knight is an excellent class that can fit into many team compositions since the Knight is a great tank. If you need to bring along multiple back-row damage dealers, like the Mage, Gunner, Healer, or Summoner, the Knight can get the attention of enemies to keep your squishy party members safe from danger. Even if the Knight's pierce damage isn't effective against the enemies you are fighting, focusing purely on defense can keep your party alive against tough enemies.