well since no one here will be able to give you a definitive answer, ill at least tell you how i approach something similar.
i have a relative who had a civil ceremony with a goy, and is othewise also a kofer.
i daven for him that Hashem should return him to Yiddishkeit.
in addition since he is quite old i daven that if he dies without doing Tshuvah, Hashem should be merciful and give him a chelek in Olam Ha Bah. but i preface such a Tefillah with a plea to Hashem that if such a Tefillah is not proper that Hashem should not listen to it and should forgive me.