You need the good ground at the base of the antenna/mast.
Adding "grounds" to switches, etc, are generally a waste of
time. Being grounded, does not mean being safe. In many strikes,
it's the grounded stuff that takes the most damage. I would ground
the supporting mast with a good ground rod, etc, and use normal
lightning suppression methods to protect the gear in the house.
IE: suppressors, etc.. Check out polyphaser, etc..
MK