Here are my two wins. First one is on Normal Roguelike and the second one is Nightmare Roguelike. I'm surprised that my Nightmare run was so quick. Now I'm playing Insane but I don't think that I will be any faster
Since I mostly play Doombringers almost all of them finish <15 hours thanks to Abduct and burst damage. I play fast take a lot of stupid risks and autoexplore all the time despite playing rougelike so I cant say im very proud of that. I think as skill level goes up so does playtime for each run but thats just my opinion and observations.