The raid isn't so much killing as much as it it surviving, the only thing you need to kill quickly is the oracles and other things sacrificing to the confluxes. The fact that three shots with the golden Gun can't kill a Pretorian is a little ridiculous, and if you include the animation time and switching back weapons, I really think that it is easier to just use your heavy weapon against Minotaurs and Pretorians, but I might be a little biased because I have the Corrective Measure which is a beast of a heavy machine gun. While the Hunter's super is the best at killing the minions during the raid, the hunter also has the worst grenades of any class, which brings his killing abilities more in line with the other classes. Considering the extra team support options and the ability to survive longer that the warlock and titan supers offer, this is what makes the Hunter the worst class in the raid. I am not really sure what you mean when you ask if any other super can kill an oracle, because since no class can, the hunter really isn't very useful since it really does not have much of a specialty during the raid.