I have a very lengthy document written up for my own design concept for BLU somewhere on one of my computers, but I can't find it right now - so I'll just post the primary points of it.

Blue Mage A class which utilizes monster magic.

Story: Blue Magic has its own interesting place in the world of Eorzea. Black Mages are appalled by it - being unable to conjure and control its wild whims the same as they do the void. White Mages see it as no different than Black Magic, a wild and uncontrollable abuse of aether wielded by ne'er-do-wells. Red Mages are sickeningly curious as to the nature and implementation of it - using someone elses Aether (monsters no less!) other than simply their own. None of this judgment does the Blue Mage any good though - as they themselves struggle to control this power, a curse upon themselves if you will.

You see, Blue Mages in Eorzea are few and far between - and some have lived since the peak of Allagan civilization! Their origins are quite similar, though executed by different hands. Most recently it has been the result of testing by Garleans, attempting to steal and imbue the Aether of other creatures, that resulted in the latest incarnation of Blue Magic.

Core Design Concepts:
  • Weapon: Dual Swords
  • Primary Role: Tank
  • Skill Acquisition: Traditional XIV job class quests for some, Rare Monster Hunting for others
  • Secondary Resource: Blue Aether
  • Special Skill Consideration: There are a few core skills in the class that do not have binary effects, which is to say - they are unaffected by the 'stance' taken by the BLU. All of the rest effectively work as two different skills based on 'stance'.