Ohhh, bosanbo, we do have similar hair properties. Yay! I'm so glad you posted! Thank you!
I always assume that an entire product line is made to work together--but this seems to not be the case for us curlies. I also tend to buy an entire product line as it's just easier that way. I am alwasy short on time so buying products in one place is quicker. It seems as if I need to combine products from one line or another to get to that HG.
My hair, like yours, gets used to a product (it's probably product build up due to low porosity) and I find I have to do a deep clean or change products to keep my hair looking it's best.
On styling products, I always try a little bit, then a medium amount then a large amount and see what differences it makes. If after 3 tries it doesn't give me volume, shine with some clumping I cross it off my list. I even try mixing two products together (such as CJPP and CJCIAB) to see if that works--it didn't. The CJPP makes my hair so dry and dull too. Same with the KCCC. Both of those products seem to have some kind of "sucking the moisture" out of my hair problem. Almost like a humectant would-- and I wonder if dewpoints play a part in that? If there isn't enough moisture in the air it takes moisture from my hair?
If KCCC is your leave in, what do you use as a styler? I should look at your signature and see!