Hi,
You can change the default management UI port in the CA\Directory\management-ui\config.js.
Stop the Nodejs server and the Management UI DSA.
Modify the the management UI port.
Start the Nodejs server and Mangament UI DSA.
The 8 DSA's on 8 different servers still exists. So you just need to create the environment and add the 8 hosts. All the DSA's will be visible.
Regards,
Shiny