I am where your at except with photo periods. What I experience with Autos is go a little lighter on nutes ( like the big guy above said (Hulk) Also watch your PPFD and DLI. you are also going lighter on these ( they do not lot large amounts of light. Also I have noticed recently(because of growing my fem photo period in another tent and they are basically age wise ) my auto drinks less than my photo. Do not over water , man these bastards will stress out with no rebound because your limited on time. I would say watch your fan leaves when the stalks on those start to bend down she might need a drink. Water first thing right after lights come on after 6 hours of darkness. You water late in the day light period and she stresses bad and once again you really don't have time to recover (it is a freaking Auto Time is not on your side) She likes the O2 at night and saturated soil hinders that. Now if you are in coco for a medium disregard that (just for soil grows) I have noticed that they do not like heat. This is my 4th Auto grow (the best baby yet!!!)  My temps range from 78.5f to 76.0f daytime temps. At night the temp will drop to 68f -69f My previous grows I had temps upto 85f-82f lots of stress on those I did notice above 85f (without co2) It was devastating results. 80 to 81f is as high temp as I would go(from experience) low temp not below 67f (night  time) They don't like a lot of humidity either uggghhh( experience) This grow I have had rh@55% veg and 45%rh during early flowering and going to drop to as low as I can go here but not below 35%rh. LST , Scrog but no HST! A little of training stress during veg and very early flower is ok. Do some type of training to make your yield worth while. Do not if you can help it train her in mid to late flower . PH a must you know that lol.  Just remember easy on the lights and heat.  I like my photo period but it just makes me yawn a lot lol(slow). I look forward to seeing how it goes. I know I am happy as hell with this cutie this grow! Not a high yielder, I hope she packs a punch. I hope some of this helps because I am no pro just somebody that likes to grow. All I know is I told you what I have done and what I am doing now . Below is the results of what I am doing now. 

Happy growing them my friend

GL Spider!