Now that you mention it... I do have the calculations for mana as well. Again, they're not 100% accurate but they're very close.
Each point of Strength adds 0.05 mana
Each point of Dexterity adds 0.6 mana
Each point of Intelligence adds 4.35 mana
Next, the effect of the Brilliance skill is taken into account, and then the mana mods on your equipment are taken into account.
Same as before: attributes determine base mana, percentage multipliers get applied to base mana, and point modifiers are added on after the percentage multipliers.
From cradle to coffin... Shall my wickedness... Be your passion