Best combination for ACCA preofessional level papers

Well, to begin with I personally don’t recommend giving more than 1 paper per sitting. It is surely a personal choice, but I believe sitting one paper per sitting secures a better first time past as you are able to focus better since you are giving all your attention to 1 subject. So better preparation.
And then, why not utilise the 4 sitting per year effectively?!

But again it is a personal choice.

Talking about combinations, I think that does not make much of a difference in what paper combination you take.
But will advise you to take SBL as the last ACCA paper since it has an integrated case study, doing the rest of the ACCA Strategic Professional Exams first would help you develop the content better.

Here is a link that may be of your help regarding optional papers in particular:

https://www.accaglobal.com/pk/en/student/sa/study-skills/options-papers.html

Hope that helps..