I agree with your conclusion that there must be an abosolute prior actuality and if for you this has equivalence with your concept of God, then it does conclude God, I agree. But what is this God(what is its nature), do we know, does anyone know?
In the old philosophy forum I started a thread asking "what exists", this was a request to discuss this same absolute prior actuality. But few posters responded, or understood what I was getting at.
I just want to make an observation about revelation here. I have experienced some revelations during my life. So I might be able to convey what is going on here, because it does seem to be a real phenomena, even if the divine reality we imagine and believe in turns out not to be true.
As I see it revelation is an experience which transcends ordinary day to day consciousness. By "transcends", I mean ones self transcends it's normal seat of intellection, of being within the body and has experiences which can be described as a lucid hallucination. An experience or hallucination which in ones sense of self and being within themselves/oneself, is more real, more present, more
known than ordinary living experience. So in a real way, one can be lifted up by a divine intervention of some sort and experience something which ones body and mind are not equipped to experience. But you experience it through the body of the intervening deity, are hosted in their body, witness, what they witness. This process enables you to see/witness the inconceivable, inconceivable with our own capacities. Following the revelation you remember what you witnessed, you know what you experienced, but your intellect has to catch up, to give meaning and explanation, but it is always only describing things in its own terms and referring to something beyond, which it can't articulate, convey.
An example which I experienced was that of transcending time. I found myself witnessing a present
outside our daily brief moment of time, that we live in, in which I saw my past and my future like viewing a landscape, as I turned to look across the landscape, I was looking across time, not space.