If you go unyielding, it's not worth going Defenders of Dievas, so it depends on what nature you want your Romuva religion to be. (Resistant to proselytization doesn't stack). You can go Unyielding and Ancestor Veneration for the same benefits of Defenders of Dievas, with Pagan sainthood added to the mix.
Go either Dogmatic or Proselytization if you want Defenders of Dievas to have full benefits, and maybe take Unreletnting to go with it.
Leadership is up to you, but odds are you will likely be the only Romuva kingdom by the time of reformation, so I don't advise on going Autocephalous.
Go either Dogmatic or Proselytization if you want Defenders of Dievas to have full benefits, and maybe take Unreletnting to go with it.
Leadership is up to you, but odds are you will likely be the only Romuva kingdom by the time of reformation, so I don't advise on going Autocephalous.