Added a section on Character attack vs. Elemental attack explaining how these terms interact in the damage formula.

Character attack vs. elemental attack
The damage formula treats character damage and elemental damage as separate terms. The formula look like this:
(1 + %character_attack) * (1 + %elemental_attack)

Sources of character attack include Assault and Pride skill, some eidolon passives, and most temporary buffs. Sources of elemental attack include eidolon passives, elemental advantage (+45/48%), Passion-type Relic weapons, and some temporary buffs (including the Kaiser Dragon summon ability).

Maximizing damage generally means raising these terms in a balanced manner. Since most developed teams will already have high character attack from stacking Assault weapons, primary and friend eidolons with elemental attack are usually optimal.