I would definitely have to say DC!! Co-Washing is lovely, M&S is wonderful but I don't think all the co-washing & M&S'g in the world would have fixed my damaged hair when I first started out. Of course I had to do a couple of trims to get rid of some raggedy split ends too. By alternating between my protein & moisturizing DCs I have almost no shedding & the breakage that I had before taking care of my hair is now growing out. DC'g twice a week also keeps my NG in check when I start getting closer to relaxer time. I was able to stretch a little longer this time around.
Had the best retention with weaves whether relaxed or natural. When my hair is out I end up just doing too dang much to it to get it how I like it. Going back to them for a while until I hit BSL.
My phone won't let me vote. I think that protective styling has helped me retain length.. If you want to get technical, I NEED to DC often, low heat, and have protective styles .
I got a lot of growth with protective styling aka sew ins. But when I took that down and between a relaxer and a new install no heat is what really helped me retain length.
Wearing my hair out with no flat ironing or blow drying was great. I learned to roller set my hair and it just grew and grew. I'm bad with heat because I love swing so I sizzle until I get it straight like I want.
Now I roller set and the swing is there without the damage and I bought an edge tamer comb for my roots