Revelations from Second Coil of Bahamut

[Bauti]

Also there is another thing, if bahamut did not killed the allags, who was then? Who had enought power to be greater than the allags. Dunno if you guys noticed but the ruins all over Eorzea are only from Dalamuh, nothing else. Crystal Tower was the only Allagan structure on land that survived, all the rest seem like it was obliterated. I think ( sory for spoilers ) that might be an old lead, in the begining of T8 Alisale said, that all those allagan defence systems, were to prevent that the """""ENEMIES"""" of the allagans could set Bahamut free, what enemies? a civilisation so great and powerfull had enemies?
Also something else, those ragnarok starships, why if the survivors just left the planet , when their civilisation was falling? They could have more of those starships, right?