I am sorry to say, but I have always been puzzled by the loss of thrust NNC item of putting the start lever to idle and wait for EGT decreasing... We have used this only for dual ENG fail scenario. I do not have a QRH at hand these days, but does it not say in smaller print loss of thrust or no throttle response ? Hence I figured you can perhaps get caught at 1500 AAL with one ENG locked at R-TO N1, or have a thrust lever stuck. And recall item C/L applies for variety of scenarios. In some, it makes sense, start lever idle, wait for EGT decreasing.
LEM, is this not the NNC one shall use? I dunno. One would be killing a good engine and your paradox of the other one going totally apepoo still stands. Precisely as you say there is but one way to reduce exposure to the risk. My view.