I replaced listen=1 with port=8333 in bitcoin.conf as port serves the same purpose as listen but only listens on port 8333.
After a couple another day of testing and experimenting I find that if I use the full text in your original post above Bitcoin Core goes online when you open up Armory (and only then), but can't sync for some reason. Whereas if you just use:
listen=1
as the full text of your bitcoin.conf file Bitcoin Core goes online when Armory is open and everything syncs up.
Mac OSX 10.10.1
Tor Browser Bundle 4.0
Bitcoin-Qt 0.9.3.0
Armory 0.92.3-beta