The question was if Superman is better off in the morally grey and black areas as a means of change in the never ending battle. So he creates an elaborate play to show people that it's not really what they want from him and in general it isn't a benevolent, idealistic approach. His condition for failure, in the story and in our world, would be if viewers came away with regret that he didn't actually kill or dismember them. As for obliging the duel, well, Superman historically has a thing with duels and it was a teaching moment that he didn't have to contrive.
Really one of only five stories, no matter how long, is gonna be a very bare minimum look at a specific facet or two. Getting a good point across also won't necessarily align with favorites imo. For examples I think Action Comics #775 should have to BOGO with Superman #247 to round out the interpretation of an answer to a particular kind of question. And I love some of the golden age but I'm not gonna hand a comic from the time of Japanese internment to a guy who just turned 30 yesterday. Finally, I sincerely don't like Up in the Sky but I can admit it's an attractive cliff note for pretty much anyone today.
I can't even pick one Bates story myself because I just love his work. Maybe that Elseworlds from like 2010 or so because it's self contained and doesn't enforce on treaded grounds.
And if I had a million dollars, I'd throw a chunk at DC to reprint the newspaper version of Super Idiot with remastered art, because it's too much fun. One of my gold standard stories.