wow, thanks for sharing! I do similar, but I can't use Deva, my hair detests it. Have you tried looking into the methods here? TECHNIQUES LINKS: SuperSoaker,Spritz&Condish,Plopping,Frizz,Clipping IceQueen, etc

Myself I really like the Supersoaker method. I think, if you have nice curls but less volume, it may be best to go for curl definition...? I find that does make up for a lot. And by second day hair, I have tons of volume. I think finding out what your hair likes is quite individual, imo! lol...experiment is all you can do - and hope for the best!

ETA: Maybe you are using too much leave-in...? That can make hair quite flat...hth!
Finer, mixed with coarser strands, low-porosity, wavy curly whirly hair...3A, 2C hair. Medium thickness, medium elasticity.
S-shaped hair with corkscrew ends. My hair is even more confused than me ;p
My hair officially hates protein Once a month is enough!
Currently a fan of TiGi products, (rock on, TiGi Curlesque styling creme!) but that will soon change - I am a self-avowed product junkie! Yay!
BIG fan of supersoaker method - thanks Rudeechick!