"The precedence is given to Unrestricted. For example, if a user is having 2 roles where one view is unrestricted and the same view is restricted in another role, then the user will have unrestricted access. In other words, if one role blocks the write access and another role allows it, the more permissive role takes precedence."

All service agents in SAP Service Cloud V2 need the Case business service assigned to their business role to access and manage cases, which is the core object for service processes. According to SAP documentation, "The Case business service must be assigned to all service agents to enable case management functionalities." BuiltInSupportService (B) is for support interactions with SAP, not agent tasks. Activity Manager (C) is for managing activities, not mandatory for all agents. Case Type (D) is a configuration object, not a business service.
Reference:
SAP Help Portal: Business Services in SAP Service Cloud V2
SAP Learning: Service Agent Role Configuration

Autoflow in SAP Service Cloud V2 automates actions based on case conditions. Configurable actions include sending info notifications to inform users of specific events, sending event notifications for system-triggered updates, and sending emails to customers or agents. According to SAP documentation, "Autoflow supports actions such as sending info notifications, event notifications, and emails to automate case-related communications." Send event email template (A) is not a standard autoflow action. Send object update (D) is not a distinct action, though autoflow can update objects indirectly.
Reference:
SAP Help Portal: Autoflow Actions in SAP Service Cloud V2
SAP Community: Configuring Autoflow Rules