I think you might confuse yourself a bit, I don't disagree with you that the theologians have an issue. However its your initial problem that I agree with. That God can't have free will. But it is assumed that he have, because he needs to. That is were the problem is.
So when you ask the question:
If god has free will then just what drives him to decide to do A rather than B?
Nothing might drive him to choose A over B, except a random choice. Unless God, being what he is, in some miraculous way have another type of free will, that makes no sense to us. Which is one of the reasons the theologians run into problems. First of all because the bible say that God can't lie, just to keep it simple. Therefore he is not free to do as he please. Now if that in itself is not enough to convince people and they still claim he have it, they won't be able to explain what this type of free will is, that they are talking about. Because it contradict the bible, so either the bible is wrong about the nature of God, and therefore it could be wrong about anything regarding the nature of God or God is able to lie, so he actually have free will, but then the bible is still wrong, because it say that he can't lie. So regardless of how the theologians tries to explain it, they end up with either not understanding the nature of God, and the bible being wrong regardless of which explanation they choose. Therefore the only solution or explanation left for them is to say that God works in mysteries ways. Which, whenever you hear someone saying that, is equal to them having no clue or answer to your question.
Now this was what I tried to explain to you in the first post, where you said that it were not relevante to you, because there was only two ways to do anything, which was through cause/effect or randomness. Which I disagree with. Not your initial statement in the first post, there is a distinction here. Does that make sense to you?
Again I think you end up confusing yourself, because you change the words and therefore their meaning:
conscious is not the same as consciousness
Conscious simply mean that you are aware of what you are doing, that you understand and know the consequences or potentially know the consequences of what you are doing.
For instance, you are standing in a room with a red button blinking rapidly. Should you press it or not, you know what a button is, you also know that it blinking red usually symbolize that it could be bad, but you have no clue what the consequences of pressing it will be. So do you press it? In that case regardless of whether you press it or not, you are somewhat conscious about what you are doing, you know all the elements etc.
conscious
adjective
aware of and responding to one's surroundings.
"although I was in pain, I was conscious"
synonymer: aware, awake, wide awake, compos mentis, alert, responsive, reactive, feeling, sentient Mere
- having knowledge of something.
"we are conscious of the extent of the problem"
Consciousness is to be self aware.
Consciousness is the state or quality of awareness or of being aware of an external object or something within oneself. It has been defined variously in terms of sentience, awareness, qualia, subjectivity, the ability to experience or to feel, wakefulness, having a sense of selfhood or soul, the fact that there is something "that it is like" to "have" or "be" it, and the executive control system of the mind
Method is simply that you follow a procedure, so first you do A, then you do B etc. A random choice can't follow systematic method, as it wouldn't be random.
Does it make it more clear?