Well really it all depends on what stage of growth your plants are at. Clones need a rather high humidity level towards 90%, but Flowering plants need lower levels if they stay high for too long pest can become a big problem.
Look up some nutrients and find the best that suit your needs. Look for some that help develop branching and than get some heavy in P-K for harvest. Try to find some way to add some Co2.
If it was me I would want to space them a good couple feet apart not in any certain pattern. You have to think about how big you wants your females, one or two hear than one hear dont do rows. Good luck