??? Island in the sundering sea

[FSTSparkz]

Right now ive finished all the character stories for each of the 8 characters and im wondering whats the recommended level range to take on the ??? island im assuming its the hardest thing to do. my lowest leveled character is 42 and highest is 76

[Bembor]

60+ aim for 4-5k hp and 600+ def. with proper gear, class, support skill and team synergy, you can attempt beating the boss.