The end boss can be pulled solo if you have a rogue or hunter.

1. Have the hunter/rogue line up on the left side of the platform so the king is closest, and the add is behind the king.
2. Have your tank standing next to the rogue/hunter.
3. The rogue/hunter will slowly advance until both mobs aggro and begin running to the rogue/hunter
4. Run back to the tank and as soon as the king is within aggro range of the tank, hit vanish/feign death
5. The king should switch aggro to the tank, and the add (if done at the right time) will reset back to his original position. Kill the king solo without the add :) More tribute!!