As your magi are starting to be finalized, I'd like you to start thinking about a few things.
First, each of your magi should have one personal servant or grog. These would have been attached to your magus' service during your apprenticeship, in order to get used to your Gift (if applicable) and build a working relationship with him. This person is almost certainly a shield grog (since none of your magi are particularly combat-oriented), charged with defending him from mundane attacks, although he may also act as a personal servant and interface in mundane matters. Ideally, that grog should be played by one of the other players (and not always the same one), so you may want to discuss with each other how to create them.
Second, as each of your magi initially learned of the opening at Fengheld from this letter, it would only be normal that they would have responded to it. So I'd like you to write your magus' introduction letter. This will let me know which parts of your background you would have shared with Fengheld, and how you sold your candidature to that powerful covenant.