2ndsbetter it looks like you are getting a lot of protein. Try going with a moisturizing DC, no repairing, no vitamins and no reconditioners, just moisture.
The aloe vera is acidic and closes the cuticle of the hair shaft, so yours might be too tight to let moisture in. Try plain old distilled or filtered water for spritzing.
Do you deep cond. with heat? That will help if you don't.
I find Suave Naturals coconut conditioner good as a moisturizing conditioner, it has been a go-to when I need to detangle or add some softness to my hair.
Sulpher is great for the scalp but very drying to the hair. Since you are in cornrows AND under a wig, your hair is coming in contact with it...baking.
Try using the sulpher oil on wash day, when your hair is loose for a couple hours, then wash it out.
So in summary:
drop the protein and replace with moisture only
drop the aloe vera juice and replace with water only
drop the sulpher oil on braided hair--and for goodness' sake don't blow dry hair with sulpher on it
keep the grapeseed oil/Crisco
trim those splits
try out Suave for a leave-in (heavy handedly then add oil)
DC with heat