Event cleared, I finally managed to land the final blow after a little bunch of tries.
Sadly I couldn't go Normal so I went Easy modo instead.
The final composition has the original Battleship Water Oni, 2 Ru class gold, 1 Gold Wo and 2 Nu-class.
I won't farm anything since my desired ships can be dropped anytime in 5-4, so I'll afk and relax a bit.
Good luck to the future Admirals, you can do it !
Sadly I couldn't go Normal so I went Easy modo instead.
The final composition has the original Battleship Water Oni, 2 Ru class gold, 1 Gold Wo and 2 Nu-class.
I won't farm anything since my desired ships can be dropped anytime in 5-4, so I'll afk and relax a bit.
Good luck to the future Admirals, you can do it !