To describe this route as "scenic" is stretching the definition of the term, but it is the only logical route between Feenicks and Vegas. You want to avoid the initial stop and go sections through all the retirement cities. One way to do that is to take I-17 north to Carefree Highway and then west to just south of Wickenburg. Longer in distance but shorter, sometimes much shorter, in time.
Watch out for the County Mounties on 93, particularly on the stretch between Kingman and Vegas. They know that by this point, drivers are terminally bored and want to get the awful drive over with (hearing the sound of slot machines in the distance).