I am certainly no expert on copyright law and licenses, but a sound engineering principle is KISS ("Keep It Simple, Stupid").  I can certainly understand that you prefer MIT license over GNU Affero for your own work (I agree with you here), but you should seriously consider if the extra complication of having to keep track of two different licenses is worth the trouble.  In particular, once you start refactor code you will constantly have to worry about not moving code from an Affero file to an MIT file.  Furthermore, the GNU licenses tends to affect the whole work, so the entire Armory will be under that license, even if people can reuse parts of the project that you alone wrote under MIT license.