The 4th Tank.

[Iagainsti]

As much as I love BLU, it probably won't make an appearance in FFXIV no thanks to how it is setup to have a set number of abilities and traits on all classes.

easily implemented. Bluemage learns his "enemy skills" actions from the job quests at each level interval. It'd make an awesome tank. Aggro Combo could be Goblin Punch>Thrust Kick>Asuran Claws, OT/Debuff combo could be a ranged, mp based like Magic Hammer(MagicdefDown)>Acid Splash(PhydefDown)>Bomb Toss, then an aoe aggro combo Aquabreath>Electrocute>1000 Needles. Mighty Guard, White Wind, Vanish, all cool CoolDown potentials. Vampire Kiss could be a cool dot/Bloodbath hybrid, the possibilities for Bluemage are endless really.