Dunes of Despair Bonus

Do you have to kill the three bosses or the three bosses and the (6?) normal mobs accompanying them too?

I'm pretty sure that killing the bosses is enough, but leaving a tail of their minions might become deadly.

You need to kill the guys with them as well.

Edit: For the to bosses in the back, use a bow to pull them. This way you can kill them, with the two in their group, and avoid popping anything else you need to kill.

Ok, thanks for the answer.