Hi Vivek,
SAP on Distributed installation (separate ASCS) does not need a enqueue work process. SAP strongly recommends using the standalone enqueue server. It is already the standard for all new installations and mandatory for high availability setups.
Check these SAP Notes for additional Information
2013043 - Performance Problems with Enqueue Work Process
2146940 - Desupport of Enqueue Work Process
Regards,
Kartik