Take 1 cutting from each plant, label, and put into a glass of water. Next put the glass of clones into 12/12 to sex them out. If all are female wait until 10 days after you put the first batch into flower to take any additional cuts.
I've been able to clone at 50%. I'm not tolally sold on the humditity of the grow. I do very well with 50% and have roots within a week. Not always but pretty close.Get your humidity up is my thought. Cuttings like around 90%, plants in veg like around 50 to 60 percent. Then in flowering around 40%.