Clemens Radermacher over at (with-emacs has a nice post that discusses various strategies for search and replacement. He considers searching and replacing both in single buffers and in multiple buffers or files.
In each case, he looks at the “traditional” way of doing it and then considers some newer ways that use packages such as Ivy and Helm. Finally, he describes his preferred method. The post provides a nice recap of the various techniques of searching and replacing as well as talking about some packages such as objed, anzu, and deadgrep that you may not be familiar with. Even if you’re an experienced Emacs user, it’s worth taking the time to read the post if only for the possibility that you may discover some newer techniques.