Hi, it is tough for me to understand the question. I would note the different between a Proxy and a Virtual Proxy. There is always only one Proxy on a Node, and then you link one or more Virtual Proxies to that Proxy.
You should never delete the virtual proxy that is created during installation. You can send users through that default virtual proxy, or you can create entirely separate virtual proxies for the users. your choice.
/dev - no. you need a separate virtual proxy for this as it is at the virtual proxy level that you connect nodes.