After a night of 25+ attempts and about 4 hours, we finally got it.

Take the Vimeo link and turn HQ on for the best quality.

This is a 10 man group from Team Envy on Khadgar doing Mimiron's hard mode and getting Firefighter. Only Yogg+1 stands in our way to the drakes now.

Taken from the PoV of a discipline priest.

Group:
Decleanone
Azzael
Cruga
Mikivericks
Æsbiorn
Seriux
Varanos
Roccoh
Revision
Narub

Music:
Pendulum - Propane Nightmares
Lamb of God - Remorse is for the Dead
Stratovarius - Dreamweaver
Devildriver - Bear Witness Unto