You beat me to it-a lot of racers run a product called Water Wetter to prevent corrosion with NO coolant, the OP in Kuwait likely never sees subfreezing temperatures-even a reduced percentage of Dexcool in the coolant, say 30%, would increase heat transfer. That would be an easier experiment than a bigger radiator, a big electric fan, etc. The thermostat only really serves to keep UP the coolant temperature, at 250F both a 195F & 165F are both as open as they’re going to get.
They run that combination in racing so that the track won't become slick with coolant in the event of an overheat or hose/rad blowout.
If you never see near freezing temperatures, go with a 40:60% ratio of coolant: water. Pure water cools the best, but offers no corrosion protection, overboil protection, pump lubrication or mineral neutralization. If I were you:
Whenever you need to change a battery (every 3 to 5 years) just dump the radiator contents out too. That or flush the entire coolant system to keep it tip-top. Refill at the 40:60 ratio. Electro- mechanical clutches are a wear item, swap it out for new too. Inspect and replace as needed: water pump &/or thermostat for same temperature as stock and a pressure cap. (If memory is right, every PSI = 2°F in boiling point rise. I.e. a 15 psi pressure cap can keep plain water from boiling over up to 230°F...by itself. Coolant adds additional boiling resistance but lowers speed of heat transfer from liquid air)
As others above said, extra duty cooling may work very well. A radiator with just one more row of tubes can quickly calm and dump temps especially in high demand situations or stop and go traffic. Many fit without further modification, they'll slip into the same footprint as the factory stock radiator.
TL;DR
Ultimately, just maintain your cooling system with regular spill-n-fills or plain water flushes. Refill to 40:60 ratio of coolant. Check and replace reservoir cap/rad cap. Check pump for visible leaks or squealing sounds, replace as needed. Check/ replace fan clutches and thermostats as needed. Aftermarket, extra or super duty cooling radiator can help, but not necessary. Just keep your coolant system serviced regularly and you'll be fine.
As other great minds above stated, going full synthetic on your oil and transmission fluids will go together great in extreme situations. Keep them fresh and topped up. They will count greatly in your favor and resist temperature extremes vastly better.