My low-po hair hates protein. I've seen several site disagree on the porosity/protein connection. Personally, I don't think there is one.

Good luck finding products - kathymack has given you a good direction to start in. It's a bit of trial and error even when trying products your hair properties "should" like.
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
LI: KCKT or CJSL
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.