Fortunately, with such massive intelligence comes the ability to look at the universe rationally. For example, people like Peter Thiel, Peter Diamandis and Elon Musk realize that at this point in time, aging and untimely death is our greatest enemy. The PayPal mafia and many other tech millionaires have thus committed to battling the scourge of aging, and invest heavily in rejuvenation technologies, instead of drones which fire undetectable ICBMS via rail guns.
These "dictators" are benevolent due to their intelligence, not in spite of it. And as technology progresses, the traditional "alpha males" of the past (i.e. Qaddafi, Jong Il) will be at their mercy. And this will be good for all of us, as the aforementioned men are devoted only to pursuits which benefits themselves at the expense of others. Their Dark Triad traits will not survive open war with the sheer genius of the technocratic elite.