I'm going to summarize some small tips that I think are very useful for any type of player.

Normal difficulty or higher is the best for any player who starts this game without knowing it in detail. Easy mode makes you kill everything in one hit.

Weapons. Almost all weapons can be found in chests but there are no big money problems (sell what you don't need except accessories). I prefer to buy weapons in stores when they are available so you can equip them sooner.

The party configuration would be: Ulan, Kaydin, Eko and Dagmar. This is the best party for almost all content. Against bosses you can use Alek for more single target damage or Alissa for control.

I recommend always having the option that allows you to know the enemies' weaknesses activated in the settings. It may seem like cheating since there are skills that some characters have that allow you to know the weaknesses but surprise: it doesn't work for bosses.

You can destroy all enemies if you accumulate points and use them with Dagmar.

The side quests add almost nothing to the story nor are the rewards worth the time required to complete them. Use that time to farm money or experience.

Speaking of farming, you don't need to farm too much to complete the game on low difficulties, just kill the enemies you encounter and avoid them as much as possible.

- Ulan
Class Base - Captain
Main - Harnesser
Sub - Guardian
Support - Black Mage

Ulan is the protagonist of the story. Her ability is tank: taking damage instead of teammates, healing a little, buffing and debuffing. I recommend increasing health, defense and agility for Ulan.

- Kress
Class Base - Fencer
Main - Guardian
Sub - Warrior
Support - Dark Knight

Kress can function as a damage absorbing character and allow the rest of the party to survive. He doesn't need agility because his passives already have enough. He is very useful against bosses.

- Kaydin
Class Base - Explorer
Main - Assassin
Sub - Hunter
Support - Alchemist

Kaydinis my favorite character, both for her personality and her usefulness in combat. She is very fast, allowing you to hit or eliminate a unit in one hit right from the start of the fight. She has a hit that lowers an enemy's agility, and with a passive ability, the agility decrease will be applied to all enemies.

- Eko
Class Base - Scholar
Main - White Mage
Sub - Harnesser
Support - Wushu

Eko is the healer of the group, he can heal everyone and is important for almost all fights. He has two paths: healer and mage dealer. The first is simple because he only needs agility and a lot of life and defense. The second is pure damage and with light magic (very useful because there are many enemies weak to light)

- Dagmar
Class Base - Sorcerer
Main - Black Mage
Sub - Shaman
Support - Chronomancer

Dagmar is a pure wizard, he does a lot of damage but he doesn't have much agility, that is, he is a second turn character when the rest have already cast the second. It is advisable to improve all types of magic since he can finish off all enemies in one hit.

- Alassia
Class Base - Summoner
Main - Chronomancer
Sub - Alchemist
Support - White Mage

This character is amazing, he can change turns at will, take multiple turns at once. He is also able to grant extra turns to his companions. He only needs agility to be one of the best characters. If you can improve his magic he can become a slightly worse Dagmar.

- Alek
Class Base - Soldier
Main - Warrior
Sub - Wushu
Support - Assassin

Alek is the typical warrior of any RPG, he does a lot of damage to a single unit, he can heal a little and buff himself or the rest of the group. A very good unit.

- Arpajo
Class Base - Thief
Main - Hunter
Sub - Shaman
Support - Dark Knight

I don't understand what the purpose of this character is. He tries to be a mix of assassin like Kaydin and warrior like Alek. But he falls short because he doesn't have Kaydin's agility or Alek's resilience. Sorry, but I don't recommend to play.