Protein sensitive hair is generally described as "straw-like". If your hair is just dry and frizzy it probably needs more moisture. This is a good tut on doing a wet stretch test: Ignore the product recs they give, it's for a professional colorist and from a company pushing their products, but the how-to part and what it means is good.

Are you low-porosity by any chance?
remember, with all advice or suggestions for your hair, YMMV!!
My hair:
2b wavy, medium texture, low porosity, med-high density. Protein finicky.
My routine:
Cleansing: DCNP, every 4-5 days (occasionally use CJ cleansers).
RO: CJSC, occasionally use JCDC
Gel: KCCC, CJCIAB for 2nd day hair (sometimes third)

Heat is my friend: warm water rinses, steam caps, and diffuse dry. I love CLU cloths and my Denman.