My hair stays moisturized just using conditioner during my shower and staying away from cones. Ever since I gave up the cones, my hair will stay moisturized for about 3 days without me adding anything to it. I have started pre-pooing these past couple of weeks because it allows me to detangle my 8 months post hair faster but when I'm all natural, I will cut this step out of my reggie. I honestly don't even believe in deep conditioning unless it's with an ingredient that is known to actually penetrate the strands (water, coconut oil, evoo). Most DCs don't in my opinion which is why I stopped DCing about 5 months into my HHJ. So 13 months into my hhj, for me, the key to keeping my hair moisturized is staying away from the cones.
I don't know if it's necessarily my leave-ins because I stopped using cones the same time I started with the leave ins but my leave ins are diluted Vo5 and an oil mix that consists of castor oil, evoo, coconut oil, and sunflower oil.
And I didn't stop using cones intentionally. I just realized one day that my hair was staying soft for days and I had to figure out what I'd been doing differently. So now, I will only use cones if I'm using heat.