In an earlier post, the question cited below was asked.
A brief statement as to my belief would be: I believe that salvation is a choice that all make as to whether or not one wants to spend eternity with God and God accepts that choice.
On this basis, doctrinal understandings are only salvational to the extent that they may affect the choice that one makes.
On a personal basis, If I believed that God causes sinners to be eternally burned by a fire that never burned me up, I would reject God and not want to spend eternity with a God of that nature. So, for me that doctrine would be salvational. In a similar way I could posit that some other doctrines could be salvational.