Caching HTML to disk via W3 Total Cache or WP Super Cache is really all you need on most hosting. I never got around to putting Apache behind nginx, but have st

Caching HTML to disk via W3 Total Cache or WP Super Cache is really all you need on most hosting. I never got around to putting Apache behind nginx, but have still survived some relatively large traffic spikes for a personal blog (e.g. 100k+ page views in a few hours) without any trouble at all. Not to say that your setup isn't better (it obviously is), but I want to make sure no one's intimidated by the task of hardening their WP install because they think they'll need to do both 1 and 2 for it to be worthwhile.