Apparently Limsa has two DoM guilds...

[normalforce]

Seems plausible to me, Yoshi P mentioned blue mage multiple times and i think it would clash less than corsair with their role as enforcers of the law in Limsa. If i'm remember the lore correctly, and assuming it hasn't been changed, been awhile.

I do wonder though, that could limit their spell list quite alot. At best i could imagine that completing each blue mage quest would unlock a slot for an additional blue magic spell to be set. So their could still be a large array of learnable spells, you just couldn't equip them all.

Been reading up on Gun Mage from FFX-2 as I did not recall their Blue Bullets abilities. 16 abilities in all, which will probably closely correspond with the total number of abilities we'll get by level 50.

For those interested in following along: http://finalfantasy.wikia.com/wiki/Blue_Bullet

Each Blue Bullet ability needs to be learned from a certain monster type, which could easily be folded into a class quest. Every 5 levels, go to X and fight Y until you learn Z.

Blue Bullet abilities:

1. Fire Breath
2. Seed Cannon
3. Stone Breath
4. Absorb
5. White Wind
6. Bad Breath
7. Mighty Guard
8. Supernova
9. Cry in the Night
10. Drill Shot
11. Mortar
12. Annihilator
13. Heaven's Cataract
14. 1000 Needles
15. Storm Cannon
16. Blaster