Every time Ifrit is defeated by Leviathan, the fight can be retried from the current phase. In theory, it wouldn't be such a time-stopping Eikon fight if it weren't for the Tsunami phase, a race to stop the onslaught before it instantly engulfs everything in Mysidia. Here's how to break Leviathan's shield in Final Fantasy XVI: The Rising Tide.
How to Stop Leviathan's Tsunami Ultimate in Final Fantasy 16 [FF MODE] – FF16 Short Boss Guide
Leviathan phase 3 doesn't discriminate, the difficulty is high no matter what mode you play the game in. The main thing is that you never have a moment where Ifrit isn't on the attack.
Spitfire is Ifrit's laser ability (R2 + Triangle). Use it every time it charges, no matter when you are.
Brimstone is a charged explosive shield ability that can only hurt monsters at close range. When you are right next to Leviathan, hold R2 + Square until the meter is in the red zone and unleash it. Like Spitfire, the goal is to use it when it is charged for another use.
