/lit/ - Literature

How would you guys go about outlining a story (or at least portions of it) that has five main perspectives that intertwine, and each of those perspectives then further breaks down into more?

What I plan to do is: go back through the parts of the story that I have already written without the use of any outline and try to make an outline with what's there. This way, I can go back and see what the causes and effects were, so then I can draw it all out and have at least some idea of how to go about actually creating one for the next portion(s). I wanted to write the whole thing without any serious outlines, but it's just too confusing trying to make everything coherent without one.