The Cove of Decay: Epic Angler  

Speak to Googegguta just outside of the Cove of Decay in Thundering Steppes to get access to this zone.

This is a pretty easy instance if you want to run in and destory an epic for the AA. Rognog begins the fight non-aggro, and there should be no trash mobs leading upto him. So, you run over and dive in the water. In there should be either fish or crabs. Either way, you run around killing everything you can find in the water. Once that is done, Rognog will turn aggro and charge your party.

To begin with, he's Level 52, epic x2. Have your MT run straight over to one of the wooden shacks or tents at the camp and get inside it. He needs his back to the back of the tent/shack. This is to prevent knockback. At 50%, Rognog will despawn and respawn at full health as an epic x4. Your raid and MT need to be aware of this as he also memwipes at this point, so a stray heal or nuke will get his attention.

Other than that, get back into position and just burn him down.