pineteam, that makes no sense. What more critical scenario could there be to fly optimum relight speed other than ALL ENG FAIL?
Besides, it is not correct anyways. For IAE the number is 280, for CFM 300. Please check FCOM before spreading rubbish. Frankly, I doubt your stated credentials: why would a trained pilot need an acronym to help remind himself to calculate TKOF speeds before pushback, is well beyond me.