Table Splitting and Package Splitting

Dear Gurus,

We have an ECC with 4.3 TB of database running on MSSQL 2008 and planning to migrate to SAP ASE.
We plan to use SWPM parallel export/import feature.

I understand that the table splitting using R3ta can be applied for either Top 20 or so biggest tables or tables with longer export runtime (based on the earlier mock runs).

But what I am unable to figure out is that what should be approach for splitting the table. E.g, we have CDCLS cluster table of around 300GB. and couple of more tables with 500GB, 400GB etc.

I have following queries regarding table and package splitting.

1. What should be min and max splitting ratio per table?
2. Does the behaviour of R3ta (R3ta runtime) increases with the more number of splits per table?
3. What aspects need to be considered before deciding on the splitting factor of a table?
4. Once the R3ta split is done, what should be ideal ranges for spltting?

Request you to guide me in this regard.

Thanks in advance.

Regards,
Ashok