You've basically answered your own question - you want to produce to 1080/24p.
Assuming your source clips are already in that format, you can put one on the timeline then go to the Produce page and click on the Profile Analyzer tool.
It should provide you with a best-matched format (which may be one of the standard profiles or a custom one) that is the ideal profile to produce to. You may also be presented with an Intelligent SVRT profile, and that would be the best possible option as PD will be able to copy all the unchanged sections of your source clip(s) directly to the produced video without any re-encoding.
If your source clips aren't recorded at 1080/24p, you won't be able to use the Profile Analyzer and you should simply choose the standard AVC or HEVC 1080/24p MP4 profile depending on whether your source clips are AVC or HEVC. PD will then convert the clips into the desired format and you will likely be able to use SVRT when reusing those intros/outros in additional projects.