First boss in Slave Pens downed by one hunter and one mage, heroic difficulty. For those who find crowd control, kiting and killing of trash mobs boring, you may skip to 9:45, where the boss fight begins.
The music is as follows:
"Tank" - Cowboy Bebop OST1
"I Hope You Die" - Bloodhound Gang
"Breaking the Law" - Judas Priest
"Too Bad Too Good" - Cowboy Bebop OST1.