Which level of SAP-ECC software components (FI, CO etc.) requires SEM-BCS736

Hi Experts,

I would like to ask a difficult question:

which level of SAP-ECC software components (FI, CO etc.) requires SEM-BCS 736?

The only requirements I have found (sap note 1602357):

- SEM-BCS 736 must have the same release FINBASIS, so hier rel.736

- BW731 required for SEM736

The current our systems levels: SAP-ECC EHP 4 and BW 701; ECC and BW on separated systems.

Finally in the BW systems we plan to have: SEM-BCS736, FINBASIS736, BW731 (BW upgrade, BCS and FINBASIS instalation).

But on the ECC side (FI, CO etc.), which level of SAP-ECC software components requires SEM-BCS736? Whether SAP-ECC EHP 4 is enough high? If not, why?

Additionally BW731 will get higher BW Business Content. This BW Business Content must be able to extract data from ECC to SEM-BCS736 properly.

The issue is extremely important: Upgrade or not to upgrade ECC from EHP4 to higher version and which version?

I cannot find any details about this topic, so good explanation would be very helpful .

Think you in advance.

Michal