So after a week's worth of intensive reading and making notes, I've redone the very sparse Wikipedia entry for the Cluster II satellite mission. (I work on the FGM instrument team, in case you forgot.)
Have a look.
I also added links to the Cluster and Double Star mission entries from the entry on the magnetosphere. I've still got to update the list of discoveries, but that's going to take another week's worth of reading. After that, the magnetometer entry will be getting some love. It doesn't even mention the fluxgate!