You said that a Trickster IF would be subordinate to a Supreme IF. I don't think that must be the case
Then the word "Supreme" has no meaning.
"We live in a retrocausal E8 block universe as sinners with a loving higher power who sometimes uses tough love. There is also a malicious deceptive force that the loving higher power allows to hurt people."
Yeah, again, that contradicts the "Intelligent" part. There is nothing intelligent about a "loving higher power" that allows a "malicious deceptive force" to hurt people.
You contradict your own constructs. Either there is a Supreme Intelligent Force, or there is not. You can't have a Supreme Intelligent Force that is neither Supreme nor Intelligent.
....So, do you, a reasonably intelligent force, pick up your phone and immediately call your daughter so that you can communicate such an important bit of information directly, or do you go out into a random grassy field and arrange eight rocks into a semi-circle, with one rock laid on its side representing the imminent danger of a car crash and hope that she passes that way and sees the rocks and can figure out the meaning of the rock on its side?...
Actually in the Bible sometimes God communicates in highly ambiguous and unclear ways
We're not talking about fables written by fallible men thousands of years ago.
....that gives rise to two IFs. One is the Supreme IF and the other is the Trickster IF subordinate...
In the Bible
Again, not talking about childhood fables.
in many religions there are many gods.
But always one that is Supreme and has power over all others. That's what "Supreme" means.
Regardless, we are talking about a Supreme
Intelligence, which means it would know how to figure out a way to communicate clearly and unambiguously such that you would have no other choice but to know it came directly from it and no other.
So ANY instance of doubt and/or anything not intelligent (as necessarily measured by YOUR intelligence, because, obviously a Supreme IF would know to craft all communications to your level of intelligence), is incontrovertible proof that you are NOT receiving any communication from such a force.
Iow, if YOU do not consider the communication to be intelligent (e.g., it tells you to harm another or yourself; it tells you to perform any act that makes no sense to YOU), then it cannot possibly be coming from a Supreme IF. A Supreme IF is not capable of deceiving you or communicating anything to you that YOU can't figure out on your own to be an intelligent course of action.
I don't think your car example is really involving much importance.
You don't think it would be important to you to save your daughter from killing herself or others?
I think God showing his existence and showing clues to his nature (e.g. he has a sense of humour) is more important than saving a person in a way that could just be seen as an hallucination.
"More important"? To whom? To a god? To a Supreme Intelligence? Once again you contradict the very notion you seek to establish. It's about YOU, not about it. It is the Supreme IF. It needs nothing. Its existence would only ever be in service to YOU.
So, how would a supremely intelligent being consider letting your daughter kill others or herself
funny? If you don't consider it funny, it cannot either.
Intelligence must be universally understandable. All actions of a god must likewise be universally understandable, or else you aren't talking about either a Supreme Intelligence or a god, you are talking about a fundamentally evil force and no others.
Every single human being that has ever lived must necessarily have the full capacity innately born into them to be able to properly judge any such being. If not, then the being can only be evil, for it has the power to grant what is necessary, yet withholds it.
It doesn't matter if it is ultimately doing so for "our own good." The act itself is an evil act and therefore definitive proof that such a being is evil.
You can liken this to free will. If we do not have the full capacity to judge a god freely (without coercion of any nature, including promises of rewards or punishment), then such a being is just a dictator, and we have no free will.
If I tell you I will either punch you or hug you, you do not have any free will in that scenario. In either instance, I am inflicting my will upon yours. For you to have free will, there can be absolutely no consequences whatsoever for your choice and one other option MUST be offered (the option to walk away without my having hugged or punched you).
Only then do you have both an actual choice and free will.