Sweet mix

I'll give you my 2 cents worth. During week 1 and 2 your pots looked pretty wet. Let them dry out a bit. Also stop giving Dark Devil nutes just give her water for now see if she improves with some normal leaves. Your also hitting them pretty hard with the nutes. I'd cut your grow nutes back to 1.25 ml per liter. If they're growing increase 0.25 ml every 5 to 7 days. Less is best for autos they usually use 1/2 of what photo period types use when in full bloom. Feed-Water- Feed- Water type routine. Let them dry out a bit between watering. You might be causing some issues with water and nutrient uptake because of this or you may have some ph issues with the soil. Sorry I don't mean to freak you out with this if Dark Devil keeps looking like that with messed up leaves it possible she may have mosaic virus or something similar and you will have to destroy her. Viruses are serious and without some type of lab testing you can't tell which one it is and there's no cure. Hopefully she'll spit out a few good leaves soon. Good luck.