I really think if the ratio is that out of balance the only reasonable thing to do is stop killing any bucks at all.
"Savethe rage for a nanny!" Should be your slogan.

If as those of you state killing does is the best thing that can happen to herd health ,then the other mortality that takesthe greatest toll on bucks is man kinds harvest of said bucks .
We can't stop cars,winter storms or the rut,which are the leading causes of buck mortality, but ethics and morals alone should be enough for you herd dynamic folks to call off the buck slaughter for the good of a healthy herd of deer.