Check out NFPA 780, and yes, rods would help. You have to be certified by UL to do so, ain't something you just do, it does take a bit of study.
That said, how struck? I mean a direct strike tends not to leave much behind...... like I always said "Lightning don't strike twice in the same place, cause the same place ain't there the second time".
If they are receiving lots of damage, a ground ring would be your best bet, and then if you want to tie your rod system to it, they could. Put rods on each corner of the home and for gosh sakes, use Cadwelds.
Surge protectors on the service and all incoming conductors such as wells is also advisable, probably too late for the Ufer ground.
If they have a boat house, check the ground for current, I've seen several installations that the boat house was better grounded than the house, and that caused a good bit of trouble all by itself, you have to insure that the main service is better grounded than any subsequent building or structure fed from that source, or you will suffer damage.
Details man, details.......