Good Jobs for the MC – Your main character is the Mary Sue of this story and is one of the most powerful characters in the game. They will be your glue that holds your team together by providing synergy with your other characters or covering for their weaknesses. They also posses raid-wide abilities, which are the cornerstone of cooperative game play.
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Good Characters for your team – Even with delicious ingredients, you need cooks to make delicious food. Similarly, you need good characters to take advantage of your good weapon pool. You’ll want a nice toolbox of characters to round out your team with important skills necessary for buffing your team, debuffing the enemy, dealing damage, reducing damage, or healing, depending on what the situation calls for.
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A relevant Main Summon for your team – Your Main Summon (as well as the Support Summon chosen on the pre-battle screen) provides a passive Aura (JP: Divine Protection) effect for your team as well as improves your team’s base stats. These effects greatly magnify your weapon’s and character’s abilities and a good team without a Main Summon will lose out on a number of really important benefits. They can also be summoned in battle for useful Call effects as well.
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Useful Sub Summons for your team – Your Sub Summons improve the base stats to your party members when equipped. While they do not provide the passive Aura that a Main Summon does, they can also be summoned in battle for many useful Call effects just like the Main Summon.
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High base stat weapons for your Weapon Grid – The HP and ATK value of your weapons translates directly to your character’s base stats. Having bigger numbers in your Weapon Grid will give you bigger numbers for your characters while in battle.
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High level Weapon Skills for Weapon Grid – The majority of weapons in Granblue Fantasy possess Weapon Skills that can improve various parameters for your characters. By filling your Weapon Grid with weapons that have synergistic Weapon Skills, you will be able to field characters that deal significantly more damage or have significantly more sustainability.
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Everything you need to get stronger – While this seems like a lot to process, in practice this is not very difficult. By improving any one part of these 6 major factors, you can strengthen your team. By improving all 6 major factors, you can reach high level content.