No simple test, but if you use a middle value, like 13% for Nuggett, and shoot for the middle of your bittering range, it works well. By the way, an all-Nuggett fresh hop IPA is a thing of beauty.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk