APO Process Chain - optimal set up?

Hi,

I have a process chain, which is running 23 jobs - identical macro calc. jobs, just the selection in each job is different - i.e. one and the same macro job is running for each Unit

Is there a known SAP APO best practice as to how many jobs to run in parallel in the process chain, as for example, now I have arranged these jobs in the following manner:

I can figure out Unit 5 + 10 +13 +18 should not be in the same vertical wing, is there any other advice?

For example  - no more than three jobs running in parallel or similar?

Thanks in advance.