If you found 3 different intensities via 3 different saturation curves the answer is to use all 3 of them. The reason they put multiple strips on the part is to check that the intensity is correct in specific areas.
Each location can have it's own intensity requirement, or all three can be the same. All three locations must be within their accepted intensity band.
So make sure to determine the intensity for each location via a saturation curve. I stress this only because I frequently find people that confuse intensity and arc height (or target arc height).
Let us know if you have any follow-up questions.
