Really? How old was Moses at the time of his death?
I won’t even entertain the idea that there is an actuarial “optimum age to die”. The whole idea is, as another poster said, ghoulish.
And of course when Zeke says optimum age to die he means from the view of the Regime, as a money-saving measure.
That said, of course, the optimum time for anyone in ISIS is, well, today.