Why pray for souls above all else?
It’s simple. The only thing that we get to keep when we leave this world is our soul. There is nothing more important than one’s soul.
Saving your soul means eternal joy in heaven.
Losing your soul means eternal pain in hell.
So the most important thing we can do with our lives is to save our own soul by accepting Jesus’ sacrifice for us on the cross and to repent of our sins, and also to try and make sure everyone does the same. That’s all that matters.