I start out at 15 yards and get my nock position perfect first. Then I'll move right to 20-25 yards and work on verticle impact. I know from experience which arrows (spine) will work best with each setup , but for you the verticle adjustments will be a good indicator for if your using the proper spine or not. Once I've determined the spine is good , which by the way if it's not you'll notice imediately because your arrows can impact as much as a foot to the left or right , then I'll just fine tune by moving my rest (we're talking micro adjustments) until the bare shafts are impacting exactly the same as fletched shafts.
I cant speak for others but since I sh** canned the paper tuning and started this method I get much much better flight from fixed blade broadheads out to my maximum hunting yardage.