The Merovingian BL usually can be saved if you grant him a city, but that requires that you are already his liege or at least christian. By the time the Age of Viking starts he is probably already too old or even dead to get any offspring.
The Niall BL can easily be acquired if you are catholic. But you won't get it easily if starting as a Germanic ruler.
I have thought about reforming the Germanic faith with Cosmopolitan, Syncretism and Autonomous (for the Syncretist trait), but that might take too long.
Are there any other options to get the Merovingian and Niall Bloodlines as unreformed Germanic ruler?
The Niall BL can easily be acquired if you are catholic. But you won't get it easily if starting as a Germanic ruler.
I have thought about reforming the Germanic faith with Cosmopolitan, Syncretism and Autonomous (for the Syncretist trait), but that might take too long.
Are there any other options to get the Merovingian and Niall Bloodlines as unreformed Germanic ruler?