IMO you need to provide her with some form of nutrients. As you are getting the watering situation under control she wants to grow but can’t reach her full potential because she is hungry. She is pulling nutrients from herself now rather than the soil. Northern Lights especially is a strong strain typically that can handle a little excess water and nutrients as well. (Should Preface that with I haven’t grown autos) Second, reduce at least 50% of your fan leaves and at least the lowest set of branches. With a little nutrients at say 50% strength with a trim back of the fan leaves and reasonable watering you will see her develop some vigor. Also be patient with the NL she seems to move slow at first and then show her true colors suddenly. At least this has been my limited experience. I have 4 NL’s one in dwc three in soil(ocean forest and
happy frog) I will include a pic of the dwc as that is all I have right now. Keep uploading pics and experiment and listen to the plant. PH, H2O, humidity, and nutrient levels. Watch these and hopefully avoid pests. Good luck!