Summary: offensive spells that are not yet in the game (and which job could get them)

[MagiusNecros]

Considering the mechanics of the game, both these spells are BLU territory.

Doom is already on Blue Mage.

Death is primarily one of the most powerful Black Magic spells.

Blue Mage has Lvl 5 Death as a more consistent version with a specific condition.

[DarkZeroUnit]

thier taking our jerbs away from BLM


they took bio away from us as well WTF Squeenix

i dont want to be just fire blizz and thunder i want to be a death dealer

[hynaku]

Isn't veraero from white mage aero spell. Then why does it add black magic to the gauge. Because verstone is from white mage spell to and gives white magic to gauge.

[ChaoticCrimson]

Isn't veraero from white mage aero spell. Then why does it add black magic to the gauge. Because verstone is from white mage spell to and gives white magic to gauge.

Veraero does not add black mana to the RDM's mana gauges. Both Veraero and Verstone add white mana, while Verfire and Verthunder add the black mana.

[KaerisKlyne]

I'm no game dev, so I can't suggest anything that wouldn't feel balance-breaking, but these are some cool things I'd love to see with classic spells:

SCH is the best candidate for Meltdown as either a single target upgrade to broil or a proc that changes Miasma II to deal all its AoE DoT damage upfront without applying the DoT.

WHM should get both Quake and Tornado. If lilies remain, I'd love for the lilies to proc off more than single target heals, and for the lilies themselves to change Stone to Quake, and Aero III to Tornado, dealing DoT damage upfront without applying the DoT. More lilies, higher potencies. There's also room here to reintroduce Fluid Aura as a lilies-only ground-targeted oGCD renamed Flood.

Osmose feels like it could be integrated as a RDM-original spell in XIV's lore, maybe as a timed buff that makes spells cost half MP, or lets melee combo recover MP at a % of damage dealt.

If we ever got an Arcane casting job, the Dark line of spells would be a better fit there than for BLU. I think there was a job in XII like that? Their version of RDM I think. If we ever end up getting that Onmyouji job that I've heard get tossed around, feels like a prime candidate.

A RDM-original AoE finisher spell would be nice, although I don't know that any classic series spells would be the way to go there.

[Archwizard]

Apocalypse
Burst
Dark
Meteor (Comet)
Quake
Tornado
Ultima
Water (Aqua/Flood)

First: Meteor is already the BLM LB3. (In PvP, their Limit Break is also named "Cometeor".)

Second: Ultima exists within the canon of XIV, and is demonstrated during The Praetorium. As Ultima has been shuffled between White and Black Magic many times within the series, I expect XIV is going with the interpretation that it belongs to neither school, particularly since it was a capability of the Ultima Weapon, an Allagan machine that predates the War of the Magi and needed to consume three Primals -- gods given form by pure aether -- to cast it.
In short, nobody gets it, good day sir.

Third: Earth, Wind and Water magic fall under the purview of Conjury, not Thaumaturgy or Arcanima. Should Quake, Tornado, and Flood ever be added, they would either be given to a White Mage or (Yoshi-P willing) a Geomancer. Hopefully some form of offensive Water magic will be added to WHM and RDM.

Given it falls under the same line as Freeze and Flare throughout the series, Burst is most likely to be an advanced Lightning spell for BLM in the future, possibly even their level 80 spell. Who knows how BLM will change in ShB, but I can only hope we finally see the lightning spells as more than self-contained DoTs through Burst, perhaps even tied back into Enochian.
(That or... just rename Thundercloud. It'd basically be the same thing.)

With all the obvious ones out of the way, that leaves... Apocalypse and Dark. Admittedly I have been curious if Foul is intended to be BLM's attempt to utilize Dark-type magic, given the lack of precedent or lore behind it. There's no "Dark-elemental" in XIV (and to be fair, elemental damage is mostly for the player's benefit than the enemy's detriment), so there's not really a particular place for them.
Assuming Apocalypse isn't marked off as an equal to Ultima (and the fact that it's been used as a Grimoire name doesn't remove it from being a spell), I could see it being the "ultimate Black Magic" to be learned when BLM reaches level 100 or somesuch, or perhaps some type of high damage DRK skill to put its output closer to WAR's now that Yoshi-P is enforcing the MT/OT balance with GUN.
Or, maybe we'll see both of these in the hands of a future DoM, like a Necromancer or Void-based class -- Dark as a Lv1 spell, Apocalypse as a limit break.