I need to clarify this concept. My understanding is that Superagent will only work as a repository and the clients are required to have connectivity to ePO server for policy updates.
Agent Handler: Will work as repository, policy updates and the clients are not required to have a direct connectivity to ePO server.
You are right, i will add some information about Agent Handler.
For fully installation you need same HW requirements as for ePolicy Orchestrator.
For example Agent Handler is used in the DMZ environment for administration devices out of company or for redundancy if you have thousands devices.
Do you have another question about Agent Handler?