I don't see why Reynir couldn't combine a bit of both, Christianity and Ásatrú tradition. People seem to think it must be one or the other, but for Nordic people we've actually combined them in various ways for centuries. Nordic Pagan traditions were never Christianity averse and although priests often complained about people leaving sacrifice to their old gods right after church ceremony, on their way home, your everyday Christian farmer saw no problem in any of that.
Iceland turning Christian year 1000 is actually a good example of that. Christianity did not just come over and trample the previous faith/s under heel, the deal was that though Iceland was to become Christian those people who wished to serve their old gods were allowed to do so*. The change was gradual and old ways didn't go anywhere, but existed in some form side by side with the new.
Norse people often converted for political convenience rather than actual faith, at least if going by sagas is any hint... if you wanted to side with a Christian king it was often expected of you**. Some kings even hired only Christians for their armies, meaning that joining in meant automatic baptism***. It took some hundreds of years before Christianity actually became the norm and even after that Icelanders have always blended in old traditions and newer traditions like magical staves. Unlike runes, most magical staves seem to have come to be during the time Iceland was fully Christian, they're in all likelihood younger than Christianity in Iceland since the first grimoires they're found in date from the 1700's. Many of them were in daily use and still are****.
* Íslendingabók
** Egils Saga
***Also Egils Saga
**** I live in Iceland, trust me you'll see magical staves everywhere and not just on tourist stuff (although especially on tourist stuff because tourists love them).
