At that moment the weight of the sin of all men was laid on Him, and for that time, Christ was separated from the Father by the sin of men He bore
You certainly are not comparing a suffering Christ to a nun that said she loved all religions (and by extension their gods) are you??
In any case the apostles didn't leave diaries.
They left letters and Luke tells the works and acts of the apostles. They left for us the information we need to live a Christian life.. and no one taught mysticism or had a night when they doubted God..
Chalk up another heresy. This is saying there was a time when the Trinity was only two,thus God was changed and moved from 3 to 2 at one time
Council of Nicea
But those who say, ‘There was a time when he [the Son] did not exist,’ and ‘Before he was born, he did not exist,’ and ‘Because he was made from non-existing matter, he is either of another substance or essence,’ and those who call ‘God the Son of God changeable and mutable,’ these the Catholic Church anathematizes" (Appendix to the Creed of Nicaea [A.D. 325]).
[But w]hen we speak of God the Father and God the Son, we do not speak of them as different, nor do we separate each, because the Father cannot exist without the Son, nor can the Son be separated from the Father"
There's no way you can know who might have experienced what -- they left teachings, not personal records of their interior life.
The Psalmist Christ quoted on the Cross would appear to have experienced the dark night of the soul, or something akin to it (and that's not the only example from Psalms).
I'm not sure why you bring mysticism in here, though often those who experience the dark night of the soul are mystics. A mystic is one who has a direct experience of God -- can you say that, by that definition, Paul's conversion was not a mystical experience?
Are you implying that Christ was ever anything other than a co-equal member of the trinity and not omnipotent? Where in Scripture is that asserted? It sounds pretty extra scriptura to me.