I would seperate the biggest from the smallest and build a partition and make it light tight. Flower the big ones to sex them. the little ones I would take cuttings and root them to find a mother plant. Then in a couple weeks I would flower them. goodluck.

Or just take 2 cuttings form each strong plant...root for 2 weeks and veg for 2 weeks then flower just to determine sex of plants still in veg...this will allow you to weed out the males. right about the time the sex shows on the young clones and you weed out the males. It will be time to flower your females. you just kill the young clones. they were sexed too young to yield enough to be worth the trouble of growing them out to finish.