What magnification level do I actually need for a desk lamp magnifier?

For general crafting, reading, and sewing, mainstream reviewers and craft-subreddit consensus point to 1.75x-2.25x (around 3-5 diopter) as the sweet spot, because higher magnification narrows the working area and forces you closer to the lens. 10X or 12X spot lenses are useful for soldering, jewelry, and miniature painting detail work, but reviewers consistently note the focal distance is very short and the field of view is tiny.