
Your character concept isn't necessarily how you play it day to day. As someone else said, let story define the character. In the FC I'm with, there are a lot of very interesting people who, in terms of mechanics, are Black Mages, Dragoons, etc, but they call themselves by other titles - witch/voidcaller, slayer, etc.Â
The person who calls her character a witch/voidcaller uses the standard black magic spells, alchemy, and uses a beady eye minion as her pet, and I assume might use an ahriman mount though I haven't seen it, myself. Technically, she's still a Black Mage, but for the sake of character background and development, she's done a fine job of rolling all these pieces into one nice, neat package who's fun to interact with.
On the other hand, Voidcallers are canon, you just don't typically see it outside of some of the enemies you fight, such as in AK. Doesn't mean someone else wouldn't have access to it in some fashion.
In 1.0, Urianger summoned monster familiars (raptors, etc). I believe he's more or less considered an Arcanist, but none of the current Arcanist abilities summon monsters. My guess is they have plans for this somewhere down the road for a beastmaster-type class, which is why we don't see it now. Still, it exists, and if someone could find a way to make it look good in RP, I'd welcome it.
So if anyone has ideas which play with lore or poke those gray areas, I say go for it, and I'd be glad to act as a sounding board to bounce those ideas off of. If Blue Mage becomes an actual thing in later expansions, that just gives the player something to play with as far as ICly refining their skills. Retcon only really happens if SE looks at it and goes "Nope, that can't happen."
The person who calls her character a witch/voidcaller uses the standard black magic spells, alchemy, and uses a beady eye minion as her pet, and I assume might use an ahriman mount though I haven't seen it, myself. Technically, she's still a Black Mage, but for the sake of character background and development, she's done a fine job of rolling all these pieces into one nice, neat package who's fun to interact with.
On the other hand, Voidcallers are canon, you just don't typically see it outside of some of the enemies you fight, such as in AK. Doesn't mean someone else wouldn't have access to it in some fashion.
In 1.0, Urianger summoned monster familiars (raptors, etc). I believe he's more or less considered an Arcanist, but none of the current Arcanist abilities summon monsters. My guess is they have plans for this somewhere down the road for a beastmaster-type class, which is why we don't see it now. Still, it exists, and if someone could find a way to make it look good in RP, I'd welcome it.
So if anyone has ideas which play with lore or poke those gray areas, I say go for it, and I'd be glad to act as a sounding board to bounce those ideas off of. If Blue Mage becomes an actual thing in later expansions, that just gives the player something to play with as far as ICly refining their skills. Retcon only really happens if SE looks at it and goes "Nope, that can't happen."