I’m currently testing Varnish on Gondor and so far it looks like it might be used fully on production basis for the server. I’m making the ultimate decision on this tonight.
On another note, it seems like the visual editor is gone again (TinyMCE). I remember the procedure of fixing this from another incident, but that time I didn’t search for any clues so it took a bit of time. Annoying, for sure.
The MCE now works again. I’m still cleaning up my WP-installation from all sorts of junk so if something unexpected is seen whilst browsing – ignore it.