In nagrand theres a progressive ring event that is designed for 1 group located in the laughing skull ruins. The exploit is you can use as many people as you want. Have the group on the quest accept it then hop into the pit and the other people can help kill the mob / heal the tank. Just make sure the group with the quest is getting aggro on the mob first so they get credit for the kill.
The quest is wort 2 bars of experiance (@ 65), 60 gold, and 10 major mana / healing potions + the choice 1 of 6 different weapons equivalent to nax gear. Takes about 10 minutes from start to finish with 1 other group helping.
Heres a link to the quests:
hf
