I truly feel sorry for you if you believe as you wrote.
Not sure why because right or wrong the outcome will probably be about the same for me anyway, as it would probably be for most of the faithful.
If God had wanted us all to know exactly how things turn out then the prophecies would be in plain language. They are clearly coded messages, the main question being, whose method of decoding is closest to being correct? I rather doubt that anyone would get all the details exactly right given the number of variables in play.
On another point raised, I would like to see the references for claims made that the Mormon faith believes that Lucifer has any standing, but I have not extensively studied all Mormon theology, my observation however would be that the one place in the current United States that has any vague resemblance to the kingdom at all would be Utah, otherwise the country seems to be under the full control of the forces of antichrist with scattered pockets of dissent and resistance. The fact that the Christian faith is driving most of this resistance is one sign that we are approaching the critical times.
Whatever the faults of the official theology, the simple version is that the Mormon people are generally living better lives than many others today, and this indicates to me that they are at least as worthy of salvation as anyone else.