I think you can apply for PRP from abroad without obtaining any visa, including a Critical Skills Visa. A CSV has never been a prerequisite for a 27(b) PRP.
At the VFS website, it says that it is required to present:"A valid temporary residence visa for temporary sojourn at the time of application in respect of each applicant, if the application is made in the Republic."
So if you apply from outside of SA, you don't need to present any evidence of a temporary residence visa to be part of your application package.
At least that's my understanding.
Last edited by a4xiaoxiami; 10th May 2019 at 08:14 AM.