If you are the facility owner, the best protection is a really good ground system as described above. Also, using 90-260 VAC auto-ranging power supplies will have fewer failures. Ferro-resonant power supplies will not fail, but will blow fuses, requiring a trip to the site. Some people use inline power filters and /or surge protectors that will pass 120 VAC, but not higher voltage or higher frequency the 60 Hz.
If you simply rent space, I suggest you protect yourself by encapsulating all your equipment in a cabinet and create a single location on the cabinet for all coax, power, and data to enter the cabinet. I placed a copper plate behind this entrance area, and installed lightning arrestors on the feedlines and used a small aluminum box to house a large AC surge protector and mounted a commercial RFI filter for AC on the box to feed power into the cabinet via a computer power cord. Any data or phone lines should pass through another aluminum box with small value low-wattage resistors in series and zener diodes for clamping. The copper plate should be bonded to the cabinet rails to complete the protection.
The idea is to offer a better alternate path for any lighting or surge, rather than through your radios & power supplies. Using this method, I have never had to replace anything other than power cords, fuses, series resistors, and a lightning protector, which can be inventoried at the site. It also works better if the Heliax connects directly to the lightning arrestor, rather than through a jumper cable. A significant portion of the lightning appears to be high-frequency, and the reactance of the outer braid of the jumper will fail to ground all the energy on the Heliax jacket, and therefore the energy transfers to the center pin of the lightning arrestor, and destroys the flash tube. Why take the chance?
Remember, any braided ground straps are poor protection. Use only wide copper strap or large CMA copper cables for grounding. Never make sharp bends in ground cables or straps, as that adds reactance that will limit the effectiveness of the ground to lightning.
Pray...