This is DOS doomsday, not composite doomsday or supes that people try to drag into all of his threads. There are people here that can do things that he hasnt had done to him before and therefore he should be able to be killed. They get ten seconds prep to do their best strongest attacks just on him.
DD would whip these girls ass in a random fight 9/10 times. But going by how Superman killed him it certainly didnt take as much as some of you are acting like. They are ready with their best attacks as soon as he appears. Not trying to speak for the OP but sounds like he wants to know if they have what it takes to kill him pretty much one time. DD would obviously crush them in a regular fight.