As we all know the current accessories most people use are the iLvl 47+ whites with the ilvl 55 GP bracelets

These are limited to +3 gathering / +3 Perception (except ilvl 55 bracelets).

Why are you using these I ask? These accessories only have GP on them which is quite obviously useless for fishers.

What you should have noticed is that your iLvl 55 GP bracelets actually have a cap of +4 gathering / + 4 perception.

This is the same for all ilvl 55 accesories. So what you should be using is

Imperial Operative Choker HQ with +4/+4
Imperial Operative Choker HQ with +4/+4
Militia Earrings HQ with +4/+4
Double Aetheryte Rings HQ with +4/+4

This will put you an extra 4 points ahead with gathering and perception.
You could go even farther with the iLvl 70 / 90 accessories and the cap will go up as well but with the price for the crafting materials through the roof I don't feel like testing it.

Happy Fishing!