This was the hardest quest I've ever done, but also the most rewarding. Only died once!!
The mobs have so many HP that without wounding/puncturing, I cannot tank them. Forced me to adapt and learn new tactics.
Drag the mobs back to the firewalls.
Use cursespewing/paralyzers.
Leave the stoned/mezz'd mobs alone so they don't respawn.
Manage shrines as a scarce resource.
Manage aggro very, very carefully.
With necessity as my motivator, I learned a lot.
Thanks to a great party for patient explanations and giving everyone a role to play!