Three fletch, all the same -- I use index nocks and just feel for the index with my thumb.
I used POC shafts, dark stained, with three white 5" shield with black index nocks this season and they flew great -- looked like a white ball going to the target. Also, they looked very old school and trad.
I am working on a dozen woodies with 3 red 5" shields with a red cap, black and white crest. and a white index nock. So far they look pretty good.
I like using three feathers of the same color.