m0useanswered grow question 2 years ago Good point by grow lady, where did the seeds come from?
your method for pheno hunting for fems is good. can clone them out and continue, not the best for breeding if that's you goal long term. best to reg seed for breeding. If they are breeders seeds and not bag seed keep it up and give them all the same care then select the ones that will make it onto flower based on performance. Are they growing fast, not to much stretch, not to stout, good healthy roots, nice smells coming off of them or when they are rubbed. then cull and move onto phase 2. and flower them out after taking 2-5 clones from vegging mom.
If they are bag seed you have no idea of its lineage so selecting the best one is a bit of a toss up, I would scrap the project and start over as its to much time invested for to many unknowns.
Good Luck!