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Nice chart. You've never had to compose a shot where the camera body is not at 90 degrees from the horizontal plane?
I do that all the time. That's what the little table at the bottom of the figure is for; it shows scale factors for tilt angle, as a function camera angle (nose down).
Anyway, it's just a starting point. After getting it into the ballpark, I use the classic Large Format approach: focus near, tilt far; not focus far, tilt near, because the TS-E lenses and Mirex T-S adapter are "axis tilt", not "base tilt". In practice, it often involves a lot of iteration, with focus checks all over the place...