In any case, as reality is in our own heads and an interpretation of a 'possible' material world around us, it essentially could still be in your head even if you allowed it credence.

I get solipsism and respect the foundations of it, but when we talk about an entity that is responsible for creating the "possible" material world and our ability to "interpret" it then there is no place for interpretations, if you need solipsism to defend the existence of God, I interpret it as a rhetorical surrender. Can you see why?

if someone truly believed this, you may consider it insane but again, it would be with your own phaneron. As we are all in our own phaneron, that could very well be a reality in someone else's mind.

Again, we are talking about God, the afterlife and meaning and duties of this life, there is no place in my opinion for any such nonchalance. If we talked about colors for example, than it would be fair to conclude that red is mostly red but not always, not for everyone. But regarding God, I'd put solipsism and the beauty of a diverse spectrum of subjective opinions - aside, away.

My point is that we are ALL theists. Because of our phaneron.

Please if you may - define this concept. I understand it as the whole effect and existance of a concept, whatever concept that is, in a single, some person's mind. Is that it?

I have many theories about what 'God' could be.

I'm pretty sure that polytheism is the belief in many gods, as opposed to monotheism - the belief in a singular. I've never heard of a term for holding many theories about God. Although I have heard that the ability to consciously hold contradictory beliefs is a merit of geniuses. 😀