Magalie, I think I might prefer Magdalie since that is how I kept reading it the first few tries of reading your poll and this post. It's only just now I realized there is no D in those choices. Magalie kind of makes me think of "Maggoty" but Magdalie just sounds like a diminutive of Magdalene.
I'm a big fan of any opportunity for general usage of Occitan in the name of language preservation, so I'll go with Magali.Generally, I'd prefer Magdalene or Magdalena but I don't dislike it.