
As I'm understanding it... your character idea is a non-warrior of light fighting in Cartaneau when Dalamund descends.
So a bit of background, since there seems to be some confusion here.
The battle of Cartaneau is the final staging point where the final remnants of Garlean's VII Legion. Their leader, Legate Nael van Darnus, was a zealot that believed Eorzea to be blighted (much like Gaius) and that the only way to restore it to any semblance of order was to destroy it outright (hence summoning meteor). By the time Caraneau occurs, Nael van Darnus was killed by the Warriors of Light. His legion, however, was whipped to a near-psychotic fervor and wholly believed the philosophies of their fallen Legate whom they had made a martyr to the cause of purification. This is why, when Louisoix came to Cartaneau to attempt to return Dalamund to it's rightful orbit, the Garleans were there to thwart their plans. The battle of Cartaneau begins and all hell breaks loose (just about literally, too).
Now, back to your question. Is it possible for a front liner to survive the fall of Dalamund? Bear in mind the actual Battle of Cartaneau was one of the biggest assaults in Eorzea up until that point, with the combined forces of the three grand companies: Limsa Lominsa, Ul'dah, and Gridania, facing off with the entire remnants of Nael's VIIth. This battle was FIERCE. Such that the mortality rate was high even without the moon blowing up. It was also relatively short -- the entire fight would have been going on for less than a half-hour before the signs of Dalamund's descent reached it's critical hour. Retreating to the main cities would not have been possible with anything less than teleportation, and the aetheric currents were too jammed up to allow linkshell communication much less send a full body through the aether. Then, of course, there is the wholescale damage of Bahamut, combined with his final Megaflare attack on Louisoix. In all honesty, the Warriors of Light themselves would have probably perished were it not for Loisouix's spell that cast them into the future.
But the question is "is it possible for him to survive without this spell?" And in that case I would say, "extremely tentative maybe." Is it probable? "No." If he was a part of the back line forces and took a retreat at the time that Grand Company leaders ordered it, he'd have a higher chance of survival (in other words, not main forces, but a part of one of the more successful ones that kept to the back lines -- the Grand Company Leaders did order a retreat and practically shouted for their people to get away).
So a bit of background, since there seems to be some confusion here.
The battle of Cartaneau is the final staging point where the final remnants of Garlean's VII Legion. Their leader, Legate Nael van Darnus, was a zealot that believed Eorzea to be blighted (much like Gaius) and that the only way to restore it to any semblance of order was to destroy it outright (hence summoning meteor). By the time Caraneau occurs, Nael van Darnus was killed by the Warriors of Light. His legion, however, was whipped to a near-psychotic fervor and wholly believed the philosophies of their fallen Legate whom they had made a martyr to the cause of purification. This is why, when Louisoix came to Cartaneau to attempt to return Dalamund to it's rightful orbit, the Garleans were there to thwart their plans. The battle of Cartaneau begins and all hell breaks loose (just about literally, too).
Now, back to your question. Is it possible for a front liner to survive the fall of Dalamund? Bear in mind the actual Battle of Cartaneau was one of the biggest assaults in Eorzea up until that point, with the combined forces of the three grand companies: Limsa Lominsa, Ul'dah, and Gridania, facing off with the entire remnants of Nael's VIIth. This battle was FIERCE. Such that the mortality rate was high even without the moon blowing up. It was also relatively short -- the entire fight would have been going on for less than a half-hour before the signs of Dalamund's descent reached it's critical hour. Retreating to the main cities would not have been possible with anything less than teleportation, and the aetheric currents were too jammed up to allow linkshell communication much less send a full body through the aether. Then, of course, there is the wholescale damage of Bahamut, combined with his final Megaflare attack on Louisoix. In all honesty, the Warriors of Light themselves would have probably perished were it not for Loisouix's spell that cast them into the future.
But the question is "is it possible for him to survive without this spell?" And in that case I would say, "extremely tentative maybe." Is it probable? "No." If he was a part of the back line forces and took a retreat at the time that Grand Company leaders ordered it, he'd have a higher chance of survival (in other words, not main forces, but a part of one of the more successful ones that kept to the back lines -- the Grand Company Leaders did order a retreat and practically shouted for their people to get away).
Thy life is a Riddle to bear Rapture and Sorrow
To Listen, to Wonder, to Entrust unto tomorrow
In One fleeting Moment from the land doth Life flow
In One fleeting Moment from the land doth Life flow
Yet in that Same Fleeting moment Thou must Live, Die, and Know