On Beta, as I saw and did run few matches, I didn't saw boss that have 3 milion HP, even if it had that much I would kill him as Ret.
What the hack you would play Prot Spec to survive and kill one boss for 4 minutes, while other players gonna troll u because they need to wait their turn ?
At least it's how works now...
Brawler's Guild
- Underground fighting rings have sprung up in Stormwind and Orgrimmar that will give brawlers a chance to earn bragging rights by testing their solo PvE mettle against some of the toughest creatures found in World of Warcraft.
- Players will prove their skill, and increase their rank with the Brawler's Guild, as they win matches against some of the most difficult solo encounters in World of Warcraft.As their Brawler's Guild rank increases, players will unlock additional rewards and activities within the Brawler’s Guild.
- Brawlers on a realm will gather together into the blood spattered ring to watch as their peers face down their own opponents.
- They can watch the battles in progress to learn from hardened Brawler's Guild veterans as they wait for their own turn to fight.If this is your first night at Brawler's Guild, you have to fight.
Anyway u get reputation with NPC as I saw when u queue for fight + when u win u get 1 gold :P