UPDATE: I added a mace and book-wielding cherub familiar!

I remixed Landon's Purifier Priest, removing all the sci-fi bits and iconography, to make an Empire Wizard with the Mace of Helsturm. In the new Old World rules, there's a pretty nasty combo you can achieve with a wizard and this magic item. I'll probably end up making a mounted version as well at some point.