As far as wire managment goes I say the fewer the better. What I personally do is drill all my tac holes then hot glue them in place.
Now you have your tac switches mounted in place, take your 30 awg wire and connect it from one leg of your tac switch to the next tac switch, through all tac switches.
All u have to do now is run one wire from any tac switch to a ground point (make sure the wire u run to a ground point is connected to a leg of the tac switch that has been daisy chain together).
Now when you install your remap tac switches all you have to do is run one wire to each tac switch instead of two wires.
The most important part of this is when u wire the tac pads on your flexboard u want to run your wires on the pad to the right, (there is two pads on the flexboard) The left pad on the flexboard the a ground point. If u wire it to the left pad on the flexbord won't recognize the tac It will think it's a ground and not a tac switch!
This will save u so much space and headache of running too many wires.
I'll post up a link of the build I did so u can see exactly what in talking about.
I will add that in the pics I posted, the picture of the tacs are solders to the left side of the remap pads on the flexboard. This is wrong! They need to be on the right pad of the flexboard!
I Hope this helps u out.
https://forums.vikingdigital.com/threads/sick-ps4-rag.6414/