I recommend the novel "I Really Didn't Want to Be a Big Brother". The story was about the protagonist who accidentally obtained the Stronger Against Stronger System. He had a unique talent that allowed him to defeat and kill anyone. Then, he began his cultivation journey of acting tough and slapping his face. Although Qiao Feng and Duan Yu aren't the main characters, they are still important characters in this novel. Moreover, the plot setting is not exactly the same as the "Condor God" and "Demigods and Semi-Devils" you mentioned. Perhaps you can experience a different plot development. I hope you like my recommendation. Muah ~