rmad server recover

Using RMAD DRE, full recovery, even using different methods, is quite clear.
However, if there is a need to recover just a specific server, how should I proceed? What is the best strategy?
Examples:
1. The server failed: I need to recover only one of several servers and promote it to the domain, without altering the rest.
2. When creating a new server, is it possible to create one from the existing backup of other servers in the forest?
2. For testing purposes, would it be possible to recover or create a server in a different structure without affecting the current environment?