True

I have been very very lazy about the whole subject of making things understandable.. which is why I am not doing my own guides

Let me try to explain, and let me know if it still doesn't help enough..
Your guide suggests 103 ES as a block for 2nd last camp in whirlwind.. according to my calculations, you get min 4, max 6, and average 4.03 rounds with these troops.
This information is highlighted in purple above..
I suggest that if we use 99ES for the same camp, you get min 4, max 8, and average 5.54 rounds... (highlighted in green above)
While the min rounds is same, the average rounds is 1.5 round higher, and has higher margin of safety, if any one does a mistake while blocking (or if the block was already tight)
HTH
Thanks