Platinum, I am also a profound 4B, to the point where my hair looks like a TWA and it's almost shoulder length. After you have obtained porosity control of your hair (which sounds like it might be one of the problems) there are 5 products I would like to recommend to you:
1. Miss Jessie's Buttercreme (or, if you are so inclined, check out the homemade recipes for it). I use Miss Jessie's every single day and it has been good to me for the past 2 years.
2. Qhemet Biologics Burdock Root Creme
3. Amla and Olive Heavy Cream. These are fantastic products for 4B hair.
4. Castor Oil - an emollient oil.
5. THIS IS THE REAL KICKER: Vegetable Glycerine.
Let me tell you my daily routine:
1. Co-wash with Wen (Thank you January Noir; you're the best!!!) and Trader Joe's Nourish and Shine Conditioner. (I leave this combination on my hair for 5 minutes while I wash everything else).
2. Detangle with Jilbere comb
3. Rinse
4. Lightly towel dry - I find that if I keep my hair sopping wet, the products actually don't stay on.
5. Use about 2 tablespoons of Miss Jessies - I put it on my hair and distribute it throughout.
6. Then, use either Burdock or Amla cream - about a tablespoon (I use a lot because my hair is coarse and quite dense)
7. Put one teaspoon of Castor Oil and one teaspoon of vegetable glycerine together. Distribute through hair. (I think I use more than this but this is just an estimation)
8. THINK THIS IS THE MOST SIGNIFICANT STEP: I haven't heard of anyone doing this but you have to do what works for you. I pour the vegetable glycerine
directly onto my hair and distribute throughout my hair, ends first.
With the exception of the castor oil/vegetable glycerine combination, I don't dilute my vegetable glycerine. When you have 4B hair you have to bring out the big guns!
Also, if it is at all possible you, do not use cheapie conditioners. They do your hair no good. As someone else mentioned, it might be silicones jacking you up all kinds of ways.
Good luck, friend!