Current:
"Swaps current INT and MND attribute ratings, while increasing damage dealt by attack magic by 10% and reducing spell-based HP restoration by 20%. Effect ends upon reuse. Cannot be used in PvP areas."
Requested:
"Swaps current INT and MND attribute ratings, while increasing damage dealt by attack magic by 5%, reducing spell-based HP restoration by 25%, and greatly increasing accuracy. Effect ends upon reuse. Cannot be used in PvP areas."
Greatly could be about 200% (for now), and then 225%, then 250%, as item level increases.
Eg, base accuracy for White Mage that is i210 is 400. 400 x 200% = 800, which is more than enough for A8S I believe.