Logging in this way may lead to invalidity of your log book in other parts of the world that don’t recognize this hap hazard way of logging hours. Log what the manufacture says the AC needs. In other words if the manual says 2 crew log it, if it doesn’t then don’t. This way you can always hand your log book over to anyone with a smile.
I wouldn’t go by SACAA they could change their minds next month and then what, you have invalid hours in your logbook.
Just by the way I have seen a 1900 P2 rating in a SA licence!!!??? Go figure