He's hard enough when yo have two faction competing for him on a PvE server. Unlike some servers that are all Horde or All Alliance, more balanced servers get to fight for it.
Here is the mess we had and we still had about 5-6 more wipes after it was taken. http://tinyurl.com/bmvqjz8
I had the opportunity to kill this wold boss - it took 4 groups of 40 people, most everyone was cross-realm (invited by friends of friends) and it took 3 attempts.
I died laughing when someone pulled aggro and the boss turned around and literally 1 shot 100+ people.