What is the biggest single damage number possible (no LB)

[Cheeto]

I did a bit of a search and didn't find anything, which I found a bit surprising. What combination of skills leads to the biggest theoretical damage number you could see pop out of a mobs head? Assuming a critical hit, ideal gear for all classes involved (like Allagan weapons if you want to make a case for MRD, THM, etc...), and that any level of party buffs are available.

Is it BLM with raging strikes, astral fire 3, flare on a foe requiem target?
Can a DRG beat that with a Blood for Blood, Power Surge, Dragonfire on a foe requiem target?
Could MRD creep in the game with berserk, raging strikes, blood for blood, maim, butchers block combo'd on a storms eye'd target?

What's your pick?

[Lecreuset]

Highest I've seen is 2.5k from a BLM raging strikes bla bla bla

the BLM was mostly crafted gear 4 ilvl 90 gear(2 left 2 right)

[NeoAmon]

Buffed Flare can reach some insane crits and no other job could reach it.

Personal record is 2.6k in AK using HQ food, HQ int potion & raging strike. I think it was also buffed by Foe been a while so can't be sure if I had Foe.

[xyaie]

power surge doesnt buff dragonfire .

i'd say a blackmage flare crit or marauder butcher's block. in gear similar to my dragoon hitting 1k with BfB, flare, fester and butcher's block (on a marauder with everything up) have been critting for 1600+

all and all i'd say flare as its the only one ive heard of breaking 2k

[Gourry_Gabriev]

Power surge doesn't work with Dragonfire Dive unfortunately. I would have to say BLM will probably put out the biggest single hits with their 1600+ Fire III and Flare crits.

[Leiron]

BLM Flare is the highest potency in the game, and astral fire 3 boosts it by 80% I believe, so it has the highest potential for damage period.
After that, I believe the hardest hitting immediate potency comes from Dragoon's Vorpal Thrust combo and then Marauder's Butcher Block combo.
Don't quote me on that though my memory is bad.

[ChaozK]

Dragonfire dive also doesnt get boosted by Foes Requiem, despite the description it only affects magic but nothing coming from physical attacks like Dragonfire Dive or Bards Windbite. Weirdly it does however boost non elemental magic like a lot of the Dots from SMN.

[Bardo]

Unfortunately, neither Power Surge or Foe Requiem work with Dragonfire Dive.
Just like WindBite/Venomous Bite/Flaming Arrow, the tooltips seem to say they apply as elemental damage, but they are really physical damage.
Easily tested in Coil Turn4 against Knights/Soldiers.

DRG's biggest single target hit is Combo'd Full thrust(300potency) + disembowel debuff(10%) + Blood for Blood(30%).
That's about equivalent to a 420 potency attack.

Compare that to Flare (260potency) + Astral Fire 3 (~80%) + Raging Strikes (20%) + [Battle Voice] Foe Requiem (~30%).
With buffs accounted for it works out to something close to a 600 potency attack.
Then on top of that you could get a Thunder3 proc that equates to about a 500 potency attack, and then turn around and Convert + Swiftcast Flare again for another 600 potency.

DRG and MRD can't touch that with a 10ft pole.

[ShinigamiB06]

Unfortunately, neither Power Surge or Foe Requiem work with Dragonfire Dive.
Just like WindBite/Venomous Bite/Flaming Arrow, the tooltips seem to say they apply as elemental damage, but they are really physical damage.
Easily tested in Coil Turn4 against Knights/Soldiers.

DRG's biggest single target hit is Combo'd Full thrust(300potency) + disembowel debuff(10%) + Blood for Blood(30%).
That's about equivalent to a 420 potency attack.

Compare that to Flare (260potency) + Astral Fire 3 (~80%) + Raging Strikes (20%) + [Battle Voice] Foe Requiem (~30%).
With buffs accounted for it works out to something close to a 600 potency attack.
Then on top of that you could get a Thunder3 proc that equates to about a 500 potency attack, and then turn around and Convert + Swiftcast Flare again for another 600 potency.

DRG and MRD can't touch that with a 10ft pole.

and yet, if any other dps class says that blm is overpowered they will get bitched at

[Quor]

and yet, if any other dps class says that blm is overpowered they will get bitched at

Single large hits when CD's are popped, debuffs are up, and the stars align don't make a class overpowered. The BLM still has to sit still to cast that. I don't know how many times I've seen my friend hit Raging Strikes on Titan's Heart phase and immediately get Gaol'd. Then he's broken out and has to dodge plumes. This is followed by ~5s of time to actually cast something, before he's Gaol'd again (because RNG is a harsh, angry god, who hates him).

Meanwhile, the BRD has been dealing full damage the entire time. Sure, none of it is ZOMGSHOWMEYOURCRITZ big, but it's sure a helluva lot more than the Gaol'd BLM who spends more time dodging AoE throughout the fight than he does actually casting spells.

More on topic, I've had Inner Beast crit for over 800 (got a ~2700ish heal from it once), and that's the single highest potency attack a WAR has. I imagine a MRD running Blood for Blood and Raging strikes with Berserk up could land a really mean Butcher's Block on a Storm's Eye-debuffed target. Assuming you have the Allagan Gaxe I'd say breaking 1200 at least would be doable, considering I've topped 900 with BB as my WAR using just Berserk with relic.