In which segment you want to get the benefit of SaaS optimization. The answer will depend on your choice.
Direct - ESH-ACSH for every branch OR Back-hauled - DCSH-ACSH with (ESH + DCSH optimization as a plus .for all branches ) . SaaS optimization benefits will occur in cloud segment in either case. Normal optimization gain will occur between 2 SH's (Branch to DC or Branch to Branch)