Took a look at expected out totals on my teams and they ranged from about 800 to 900. So take the middle of that..850 So .85 (top defensive team)=723/850 .8. (Very good)=680 .75 (good)=638 .7 (mediocre)=595 .65 (bad)=553 .6 (very bad)=510
Thought maybe this gives a more picture of the effect of defense.