You have the idea but you skipped a step.
1. shoot bear shafts and fletched field points and make adjustment to those shafts untill you have a single group with the 6 shafts.
2. Then shoot fletched field point and fletched broadhead shafts and make adjustments untill you have a single group with those 6 shafts.
I say 6 shafts because i use 3 of each. Any change you make to one shaft you make to the hole set of 6, make one change at a time. Dont make a nock point change and a shaft change at the same time, dont make a point weight change and a lenght change at the same time.
Start with #1 at 15 yards and as the group closes up make your way out to 25. once your group is good at 25 switch to #2. When i say group i dont mean a 4" group at 25 yards your group at your skill level could be 24" at 25 yards as long as it is a group not 3 fletched on the far side of the 24" and the bear shafts on the other side of the 24" if you understand what im trying to say.
This is the way i do it and it works well for me.
Disclamer: your results may very
PS. tune the bow how you are going to shoot it. if you shoot with a cant tune with a cant.