I love this stuff. My favorite way to use it is to mix it with a bit of CJ CQ or AIF and then scrunch it in my hair. I, like many others, find it too much to use straight up in my hair.
I can't answer about using it after diffusing since I don't diffuse.
Coarse texture, normal-high porosity, normal elasticity (Komaza Care), very weak waves
cleanser: Redken Fresh Curls Shampoo, CJ Daily Fix
rinse out: CJ Repair Me, CJ Curl Rehab
leave-in: SM Milk, Oyin Hair Dew
jellies/creams: UFD's CM, CJ CCCC
gels: CJ CQ, BRHG, CJ PP