Your passes make sense to me. I would recommend that you setup a file naming scheme so that the gold releases could be saved in separate folders. That will leave you with only the ones that are still silver to work through. It helps to see what’s left to do.
Also, if you are pulling cover art, you’ll definitely want each release in a separate folder.
If you are looking for scripts for the naming, this is the best source (old forums):
http://forums.musicbrainz.org/viewtopic.php?id=514
And there is a new thread started here:
Good luck!