You can stack Might on the rack before entering the water. Kill the two groups of Krait and open the cages. Use /gg after the last cage to resurrect at the tunnel part.

Dark Path

If you get this path, swim together and take the Luminous Plants on the way to protect you and nearby players from dying. If you are able to survive it, take the shortcut to the left after entering the larger cave. Use dodges or Invulnerability for the last group of Krait. If someone reaches the krait champion, use /gg to immediately resurrect there.

Dolphin Path

If you get this path, spam Skill 1 during swimming to reveal nearby hidden Krait and keep to the right. You can use Skill 2 to create a distraction and Skill 3 to get Stealth. Skill 5 can be used to instantly revive nearby dead allies. As soon as someone reaches the checkpoint you wait for your party to /gg and spawn next to you. Kill the Champion Krait to get to the Jellyfish Beast.

Jellyfish Beast

The Jellyfish Beast does not have a breakbar since the rework. Instead a special version of Exposed called Weakened is given to the boss. Sadly the Superior Sigil of Impact does not work with this effect. Use Superior Sigil of Force and Superior Sigil of Serpent Slaying (Krait for the split phases) instead - when playing power based builds.

The boss always starts with an AoE stun-spin attack. Stability spam is recommended to handle this encounter gracefully. Every now and then the boss eats a player. To free themselves, the player will need to complete a guitar-hero styled puzzle by always clicking the highlighted skill. If you miss the right skill too often you die. An animation of this puzzle can be found on the right side.

Every 25% the boss gets Invulnerability and Elite Krait spawn. Kill them to continue the fight.

When the Mistlock Instability: Afflicted is present, it is highly recommended to bring some kind of condition-cleanse due to the ticking aura during the split phases applying conditions.