Hyperfocus is great for clear, pre-defined tasks consisting of smaller subgoals that simply need to be tackled one at a time. This is the kind of approach best suited for difficult problem-solving, for studying, for drills and rote practice, for memorizing, and for analysis.
Scatterfocus, however, is best for those tasks that are generative—i.e., those that require a degree of creativity and innovation. Brainstorming new ideas, dreaming up plotlines for a novel, coaxing inspiration for an artwork or piece of music, or thinking carefully about a deep philosophical, aesthetic, or moral question. This is the best approach for those tasks that are by their nature undefined, and tasks that are outside the box and as yet unimagined.