ok ill forest gump this up for ya , if ya have a nice bad ass sativa ya want to shorten flower time and chunk it up a bit then go sat female and indica male, if ya have a dank ass indica ya want more yeild and stretch and a lil more head and less body, then use indica fem and sat male . we are basically in the begining stages of cannabis breeding . its pretty much trial and error. i love making seeds and growing them out, its one of the most rewarding yet slow as a mofo to get the rewards , patience is a virtue.