How does a red mage get its mana?
By casting damage spells at things.

How does a mystic fencer / rune knight / magic knight / whatever term you want, get charges?
By casting self buffs.


How does a red mage use its mana?
Activated abilities.


How does a yournamehere use its weapon charges?
Auto attacking.

What is the primary damage source of a red mage?
Spells

What is the primary damage source of a fillintheblank
Empowered delay-auto attacks


Those two things couldnt be more opposite of each other if they tried.