Sounds like you are further ahead at knowing what works for you than I am. I've been on this site for maybe 5 months and am still learning. I like the Pure Clean gel (Fructis) and it contains glycerine. I know that I get great curl from it so maybe my hair can handle that ingredient. I'm pretty sure that a humectant like glycerine would not be the reason for the increase in curl, it has to be another ingredient that causes it.
2b/3a fine/med-hi density/high porosity (I think)/ highlight-no silicones/sulfates
Lo-poo - ABBA Gentle Shampoo/ Shea Moisture Curl & Shine
Conditioner: GVCB (love it!)/ Regis OO
Leave in: As I Am
Co-Wash: Tresemme or DevaCurl NoPoo
Stylers: As I Am Curling Jelly/GF Pure Clean/ LALCurl gel - all with BRHG added
Style: scrunch/ diffuse, then air dry. I don't Have much frizz at all