Built a spreadsheet for handling gear comparisons for magic damage, since that's been bugging me lately. It's in my usual Google Drive folder:
here
On the Gear page it shows the damage (or damage per MP) value for all tiers of all elements, so you can see how damage is affected across the entire range of spell options. It highlights the better of the two gear sets' damage in green.
Notes:
1) Uses the new magic formulas (currently on the test server), not the current ones.
2) Is set for any of the four major nuking jobs: Blm, Sch, Geo, Rdm. Because of this, gear isn't guaranteed to be usable for the currently selected job. Account for that if building gear sets.
4) Doesn't account for resistance rates (though it does have magic accuracy field in place for later).
5) Doesn't yet account for a real "DPS" value. Fast Cast field is in place for future calculations.
7) Handles Magical critical hits and Conserve MP proc averages. Handles MP savings for Dark Arts (or costs for Light Arts).
8) Does account for MP savings of Seidr body.