Have you tried the KMS Sea Salt Spray? I don't know how it works with diffusing and whether or not it's heat activated. I tried it out just air drying my hair and got okay results. I don't know if will be for you but just a suggestion.
Anther one that is a spray is the AG curl trigger which is pretty comparable to the spray above but again not sure how it works with diffusing, etc.
Shampoo: Herbal Essences Totally Twisted
Conditioner: Herbal Essences Totally Twisted
Leave in: Beyond the Zone Protein Cocktail
Curl cream: Beyond the Zone Noodle Head Kick Up Your Curls Cream
SOTC Product: Argan Oil
Hair Type:3A/B

Fine
Hair likes: Coconut Oil and protein, protein, protein
Not CG just doing what works for me