FFXIV The Second Coil of Bahamut Turn 4 (T9) solo speedkill in 3m24s

 

At the current item level, this requires perfect setup and burst rotation from red mage. The idea is to skip the elements phase as the mechanic is instant death as soon as you fail it which is inevitable as a solo player. The phase transition for elements is 47% so you have to get Nael as close as possible and wait for a heavensfall cast. While heavensfall is happening Nael is animation locked and cant phase transition, giving you a necessary 2s where you start to damage the boss. With better gear this will be easy, at the moment you need to do a lot of damage really quickly, its approximately 350k in 15s.