Rotgrip

Zaetar's Grave
Find Rotgrip in the lake and bring the fight to the bank rather than spreading the group across the water. Clear the approach to Princess Theradras before pulling her: Repulsive Gaze can send players running into anything left nearby. Keep the group together for the climb from the lake to the final chamber.

Rotgrip
Elite BeastRotgrip combines Puncture's continuing bleed with Fatal Bite's health drain, testing tank healing while his own health recovers.
Abilities

Puncture
Inflicts Physical damage to an enemy every 2 sec. for 10 seconds.
Keep healing the tank between bites because Puncture continues dealing Physical damage.

Fatal Bite
Recover the bitten player's health promptly; Fatal Bite also heals Rotgrip, so the group must continue dealing damage through that recovery.
Tank- Bring Rotgrip to the bank with the healer already in position rather than starting a chase across the lake. Keep him there while Puncture and Fatal Bite concentrate damage on you.
Healer- Keep sight of the tank on the bank and heal through Puncture between Fatal Bites. A quiet interval between melee hits does not mean the bleed has stopped.
Damage- Attack from the same bank as the tank so nobody draws the fight back across the water. Maintain damage when Fatal Bite restores Rotgrip's health instead of switching away at the apparent loss of progress.