What is the best class for Jean in Fire Emblem Engage?

sportskeeda.com:

Fire Emblem Engage boasts a large number of useful characters, including the powerful Jean. Recruited during the Paralogue 'Budding Talent,' as long as you enter and complete the stage, the young Jean will ask to join your party. He begins his time in your group as a healer and is certainly a worthwhile addition to your team.

At this point in the game, you likely have one healer at the most, so picking up an extra option is going to be key to your success. Most of Fire Emblem Engage’s later stages split the party up, so having someone like him around is a great idea, as he can easily aid your party in the direst of situations.

However, you shouldn't waste your time when developing his powers and upgrading him. When using this character in Fire Emblem Engage, what route should you take?

Presently, there are four classes that really stand out as options for Jean in Fire Emblem Engage. These include High Priest, Sage, Martial Master, and Mage Knight, with all four of these being fairly good choices. If you want the best possible version of this character in Fire Emblem, you should opt for High Priest.

The weakest option, frankly, is Martial Master. Unfortunately, his strength growth isn’t good enough to make the most of this class, and there are several better options in Fire Emblem Engage. To get him to High Priest, use a Master Seal when he hits level 10 and then shift him to a High Priest.

Jean’s personal skill, Expertise, is going to make his stat growth get out of control fast, since it gives him enhanced stat growth with every level up. You'll want to transition to advanced classes as soon as possible in Fire Emblem Engage.

What about his build, though? What Emblems do you need to focus on with Jean? He has several