Leadership

Leadership is a "make your own aura" type of skill. Depending on how you distribute your passive skills, the aura will focus on different strengths in your party. You can also go for an all-round aura by maxing the aura itself.

Semi-active skill
Leadership gives you +1 to each of the attributes described in the passive skills.

Passive skills
Tactics increases defense and spell damage. It is best used with casters because of the increased spell damage. It can also be a strong defensive skill combined with Battle Roar. It can give your whole party enough defense to rarely get hit.

Strategy increses accuracy and movement speed, which means your party can move around faster and thus farm faster and find summoning pillars faster. Everyone likes speed.

Teamwork increases attack speed and magic crit damage. Attack speed benefits almost every build, and magic crit damage benefits casters with high crit rate.

Morale increases debuff resistance and heal effect. The increased heal effect can make your healers stronger. Debuff resistance is situational against debuffers.