I apologize if this has already been reposted, I'm trying to catch up on this big thread - but your keen reference made me go look deeper (can't believe I didn't notice since I loved my BLU in FFXI lol)
Tizona is a blue mage exclusive weapon (in FFXI), a weapon he uses in the fight we were just talking about. The group lead by XI Raubhan was Immortal Lions, and in FFXIV by the same name it's Immortal Flames lol. As well, both have similar duties of being an elite group that guards the city and serving the empress.
Of course as you already mentioned he uses a bunch of abilities from Ifrit and that one bull attack (FFXI's limit break is The Beast Within if that means anything). He's made an inhumane roar before (could just be "epic" roar, but I thought it different enough). Being able to learn from your enemy and use monstrous (literally) attacks would make you an excellent gladiator for sure (not gladiator the class, but the activity in which FFXIV's Raubahn gained great wealth). He wields a scimitar like weapon which we'd be used to seeing in FFXI, even more so dual wielding before he became all right. He's massively scarred, good sign of someone who takes a lot of beatings and as a Blue Mage that can be your knowledge and life blood of your power.
He has quote, that I've narrowed to ". . . The battlefield is the best and worst of places. Where else can a man's enemy become his mentor, . . .". That's some blue mage logic right there! (Could be applied by other classes of course, but that is extremely befitting of a blue mage).
Finally, he's from Ala Mhigo - he's from the east.
So your reference isn't just a name, it screams parallel xD. Now I'm set on Raubahn being an NPC Blue Mage (NPC meaning they always get haxxed versions of abilities, and illegal items).
Yoshida, please don't turn Blue Mage into some side game - let Raubahn be my mentor.