To me the MopTop daily conditioner is very similar to the OneC. The MopTop does not contain hops, but it does have protein in case anyone has sensitivities. It smells very similar to the OneC as well (lemon sage scent). It's not any cheaper than the OneC, unfortunately. I also really like CJ curl assurance smoothing daily conditioner - its not a dupe of the OneC but its a nice daily RO. Also, have you considered that the fragrance could be what you're allergic too? You could try the Devacure version of OneC (I believe the ingredients are similar - including hops- but the scent is different) and see if you get the same results minus the rash.
2c/3a, botticelli/wavy/'swavy (huh?)
fine, dense, normal porosity/elasticity, dry climate

My favorite brands are Kinky Curly, As I am, Curly Kinks, Curl Junkie, and Darcy's Botanicals. Also love sealing with oils (loving argan oil right now) and styling with jelly products (KCCC is my current favorite). Mostly trying to keep it simple!

CG since 12/29/2011