Better Off Dred

Today I soloed this as a Demon Hunter, though it's probably easily soloable with any class at level 100.

1. Gather ALL raptors - ALIVE.
2. ENGAGE boss / King Dred
3. SINGLE TARGET each raptor down and immediately press/spam the Escape button.
4. Rinse and repeat until all raptors are dead.
5. Kill boss.
Achievement complete.

You will auto attack and kill King Dred if you target him from him attacking you. Then you have to hop on another alt to try again, or wait until the dungeon is reset. I speak from experience from accidentally killing him.

Enjoy. :)

There are 7 total raptors in the fenced-in area with King Dred, one may be safely killed before the pull to retain the 6 required raptors. King Dred does not summon any additional raptors, and only the closest one or two will pull with him, depending on his position when you pull. Periodically he will cast Call Raptor, calling one of the raptors in the back of the pen that has not yet engaged the group to assist him. If he isn't calling them fast enough, group members can manually pull additional raptors during the fight.

Having an off-tank to pick up the raptors is very helpful for this achievement, as King Dred will periodiclly amplify bleed effects on the tank by 75% and reduce the tank's armor by 75%. Each scytheclaw raptor uses a Rend which can stack from multiple scytheclaws (but one raptor cannot stack his own rend multiple times) and each gutripper raptor will use a debuff that reduces its target's stamina by 15%. (does not stack) If the group fails to kill King Dred, the raptors you have killed will not respawn and you will not be able to complete the achievement until the instance resets if you do not have 6 left alive.

You're both wrong. It's clearly a reference to that TV show on ABC, Better Off Ted.