To which I would add, if using Galaxy for hosting the Meteor app while also employing a reverse proxy, to have a look at this: Reverse proxy with nginx + app on Galaxy
Which reminds me, using a reverse proxy has the additional advantage of not having to mess with DNS (and then wait for hours for the changes to propagate). You can then still put stuff on several servers, do load-balancing and all.
It has the downside, however, that everything arrives at the proxy-server first.