I would check the Auto flower threads. Theres a few big ones out there with lots of info. I don't know much about autos myself. If you want a large yielding quick plant tho check out critical + or AK 48 both will i'm sure give you more yield than most auto's and with such short flower times its practically the same time as a good yielding auto. say you veg for 4 weeks and flower for 7 = 77 days. Auto's go from 9-10 weeks i think so 63-70 days.
haha sorry just my opinion on it.