How old are your fusions? Norway had some that the piece that is glued to the arrow was made incorrectly. The shop i go to had all their stock replaced from Norway with the new vanes and it has been a non issue since. I have a dozen fletched with them for 3d and they are all sticking like they...
I think is more of what you want. Black is a natural shade in nature and what they see is usually just the front slim profile anyway. I dont think it matters at all.
I have aDarton DS-3800 that is shooting 307 with a 420 grain arrow at 66lbs. I found to get to fly decently that i had to Refletch my arrows with a 4 inch helical vanes. Also went to slicktrick standards. Wacem broad heads also flew very well, but i think the 4 inch fletching had alot more to do...