I just spotted this page on Wowhead:http://ptr.wowhead.com/zone=6771
Seems it could take a while to complete if you have to face 7 opponents. Will be interesting to see if theres any limitation between the individual fights and the stages. If you have opportunity to heal/change abilities/pets.
If its limited in any way, and having to face multiple opponents, then pets with high staying power would be prefered I believe.