RFCUSER which authorization should have?

Hi,

Our crm gus ask me create a user name RFCUSER in our r3 system. But the gus can not tell me which authorization profile give to this user . So he ask me for SAP_ALL & SAP_NEW . Can somebody tell SAP_ALL is a sound choice? or sap has some special role for CRM integation user in r3 system?

Thanks a lot!

Terry