Water internal and external goes a long way in keeping your hair'style moisture in balance. You can spritz water on the hair and seal with oil or a butter. Alternating protein DC with moisture DC should keep the protein/moisture balance.
Xtreme wetline gel is where it's at! You can get it from sally'so for like 6 for a huge tub. I rarely wng due to my length but when I do it's with this stuff. On soaking wet hair, I add a little leave-in mixed with a touch of oil. I rake in the gel and use a "praying" hand motion to smooth the gel down my strands. When I am done, I shake it out a few times aND use a microfiber towel to catch any drips. I air dry (which can take up to 1 day to dry) b/c I don't use direct heat.
Deep conditioning with heat or steam can work MIRACLES! I got a hair analysis done by komaza care and it was worth every penny! I got the one with the phone consult. They don't push product on you either. If you discuss with them the issues that you are having with your hair and your goals they can certainly give you incite.
I have been natural most of my life and just now started to focus on length retention.
Also your curl pattern doesn't change as it gets longer. Your curl pattern is just stretched out b/c of its weight from being longer.
For example, my hair is a mix of 4a,b,c and when wet it looks like 4a b/c of the water and gravity pulling down on my strands and lenght if that makes sense. It just elongateseems with the water making you "think" that your curl pattern has changed.
Try not to get caught up in curl definition or product junkying (if that's even a word
)