Conditional immortality as I am familiar with it is closely related to annihilationism though it may be a broader term that is not identical to annihilationism. 4,5&6 on your list don't address it at all. 4, 5 & 6 seem to be extending salvation to certain groups of people.
To me 'conditional immortality' is that some will be saved, and some won't.
So 2 & 3 are not 'conditional' if that applies to humans only. If no devils are saved, then not all are saved unconditionally.
The rest are conditional, with the necessity of ticking certain boxes, as it were.
The New Testament is surprisingly annihilationist in tone.
In annihilationism/conditional immortality, the saved have eternal life, the unsaved do not.
OK.
The unsaved have no eternal existence. No hell. Those who are not granted salvation/eternal life are eliminated, annihilated, or in some teachings (possible other religions) not resurrected at all. The state of the dead between bodily death and the general resurrection is unconsciousness.
As a universalist, I don't believe in annihilation, nor any mode of damnation, eternal or otherwise.
I'm inclined to agree with those theologians who regard any 'loss' with regard to creation as a defeat of God and in effect presents a limitation of His Infinite Wisdom, Justice, Mercy, and Love.
My Theology of Redemption is the Recapitulation Theory, as posed by Irenaeus of Lyon in the late 2nd century.
(The English 'recapitulation' is a translation of the Greek
anakephalaiōsis, a 'summing up' or 'bringing together.')
"Christ is the head of all things already mentioned. It was fitting that He should be sent by the Father, the Creator of all things, to assume human nature, and should be tempted by Satan, that He might fulfil the promises, and carry off a glorious and perfect victory."
"1: He has therefore, in His work of recapitulation, summed up all things, both waging war against our enemy, and crushing him who had at the beginning led us away captives in Adam, and trampled upon his head, as you can perceive in Genesis that God said to the serpent ...
"... And therefore does the Lord profess Himself to be the Son of man, comprising in Himself that original man (Adam) out of whom the woman (Eve) was fashioned, in order that, as our species went down to death through a vanquished man, so we may ascend to life again through a victorious one; and as through a man death received the palm [of victory] against us, so again by a man we may receive the palm against death."
(
Against Heresies, Book V, Chapter 21)
I was once told that was the Jewish view, though I am now convinced that is not quite that clear cut.
Yeah, not quite.
IF that is what you mean, that is just partially accurate. The Christadelphians developed in the UK and North America, I believe, and remain more prominent in the Commonwealth than here. Further, every denomination that has declared conditional immortality/annihilationism to be truth has gotten their ideas from their read on bible texts. They have all also become worldwide.
I apologise.