I already told you: As total numbers increase, the same sized advantage in numbers represents a smaller and smaller advantage percentage wise, which is what ENY goes off of.
with 150 people in an arena, numbers being 56, 44, and 50 (a relativly small advantage), ENY is fine (just assume it is).
But it won't be enough when you double the numbers, because 112, 88, and 100 gives the same percentages as 56, 44, and 50, even though the numbers advantage has increased from 12 to 24. With twice the numbers advantage, ENY remains the same.