It is generally better to clone plants with really good genes and harvest the rest. If you are interested in cross breeding to get the most out of your growing setup, keep a few decent ones for crossbreeding. This is not my video, but it is a great tutorial for crossbreeding the perfect strain (all G's and Y's, though you could also go for H's if you live in the snow): https://youtu.be/I5w0KAqkHYI
if the condition is 100% approximately, 3g3y need 8 minutes to clone, 13 minutes to cross breed, 15 minutes to mature, 50 minutes to fruiting, 70 minutes to ripe with 65 yield.
There are dead simple calculators online (google "rust genetics calculator") which can get you to a perfect clone within 16 plants if you're lucky like it just did for me. GGYYGG baby!