I wouldn't think anything but extremely good grounding
at the antenna will do much.

Long ago, when I lived on the west central coast of
Florida (lightning alley), I had a 6-meter repeater on
a tall building. The transmit and receive antennas were
at diagonal corners of the building (no duplexer).
We got a direct hit on BOTH antennas. The damage
was something to see. Antennas had no damage except
some scorch marks, but the coax was another matter.
There would be 2-3' of coax, then 2-3' of nothing but
scorched roofing. This repeated across the entire 150' or
so length of the coax! A whole bunch of RG-8 simply
vaporized.

Steve