I have always used 18/6 for vegging, then 12/12 for flowering, no matter what the plant is as I use what seeds I find when I buy some, or given some seeds, and I have NO CLUE what it is, but every grow I've done this way (except for my organic grow) has turned out excellent.
Now IF you are getting these types of seeds, then go with what the majority of these type of growers have to input to further your knowledge of growing these types. As I am old school, weed is weed! Fast or slow, it all grows the same, depending on your conditions.