90-95 cloudy id start prepping her for harvest. You can't go off pic look alone buddy. She does look nice and fat and ripe.. if you follow the breeders recommended days for flowering you should be done within that time period
But, again all phenos are dif. And its only a guide as is pistil color. Both can be off so it really is best to know your trichome cloudiness %.
As when she's mainly cloudy is when you hit her full potential THC wise, so I'd aim for as close as you can get. But leaving a few days in for a potential flush, or a few days of nutes and just drinking water. So I tend to pull everything n the 90'95% cloudy.