The consensus is that having 5 Emerald Drakes, or healing drakes is the easiest way to achieve this.
- Pull the boss and make a large circle patch around the island.
- Keep your path, keep moving and leave the whelps alone.
- The person with aggro stays behind his party members, allowing them time to heal you when needed.
- When the boss enrages try to keep Touch of Nightmare up, reducing damage taken by 25%.