What is your optimal setup for WordPress performance?
There are many options for optimizing WordPress performance: hardware configurations, web servers, page/object caching, reverse proxies etc. What have you found to be the optimal setup for high traffic WordPress sites?
Not quite what you're asking, but I host all my own sites through spinupWP on Digital Ocean (easy, cheap), and my clients host with ServeBolt (unbelievably fast managed hosting).
separate the database from the web server.