Pre-made mindmaps should not feel like arbitrary diagramming. They need to reflect real thematic movement, strong transitions, and distinctions that actually help recall.
In practice, that means we do not build them from one source file and call it done. We compare five source files, look at how each one structures the surah, and ask which structure feels the most intuitive while still remaining faithful to the text and its meaning.
Sometimes one source is clearly the strongest. Sometimes two or more structures each get something important right, so we merge them. And sometimes the existing structures are still not intuitive enough for memorization, so we try building another structure ourselves and test whether it fits naturally with one of the existing readings or with the majority of them.
That is why building a pre-made mindmap is both a correctness exercise and a usability exercise. The point is not to replace the student's thought. The point is to give the student a serious starting skeleton that can later be edited, simplified, or expanded based on personal memory.