Where I come from, Jesus saves all but those who make a fully informed choice not to be saved. These few naysayers – so far only one on the record, namely, Judas who knew and rejected Jesus – go to a place of “outer darkness,” or a habitation without God and, hence, without glory. Everybody else is resurrected to various degrees of glory; their differences measured by the Pauline comparison of sun to moon to stars and all stages of light between. The assignment of a habitation is based not directly on what we’ve done, but what we want. Or, more accurately, final judgment is based upon what we have become through the choices we have made. At the moment of judgment, we will have no choice but to be what we most genuinely are. But, again, the worst that can happen to us in this schema is that we get what we are capable of wanting, though that may not always feel so good, as we know from our earthly experience.

Once one admits a belief in divine judgment, the question of fairness necessarily arises. Millions never hear of the Christian gospel or are subject circumstances that give them limited opportunity for moral development. Latter-day Saints believe the playing field is leveled by provision of a two-stage process in the afterlife: the first, called the “spirit world” allows for further preparation for the second (the degrees of glory) and the demarcation between the two is marked by God's judgment. Those who did not, in mortality, hear of Christ will be taught and have the choice of whether to be baptized. In the next world too, faith is an act of free will and not required for resurrection. Once all have had the chance to make an informed decision, they are judged by God and inhabit the degree of glory commensurate with their choice.

As for the second question, I can answer with an unqualified “God only knows.” Final judgment is based on that which humans can never know: the truest desires of the heart as crafted by choice and circumstance, susceptible to healing after death, and always bound for glory.