lisanaturally... Ok I understand.... Basically what I've learned is roller setting my transitioning/ natural hair requires less after wash product then relaxed hair. With my transitioning hair which is 4a/4b I've found that a good wash/condition and deep condition are what's most impt! As far as leave ins I use about a quarter size total of all the products mixed together on my whole head.
Also are you roller setting to leave it curly or straighter?
Either way Since your hair is shorter make sure your using the right size rollers, as a relaxed head I could use the huge purple rollers on basically all of my head with no problem because my hair was straight and easy to get around the roller. As a transitioning/natural head I've gone down to mostly grey with some black because it's harder to get my hair to smoothly go around bigger rollers. Also I had to switch the way I was rolling my hair meaning I used to take the section on my hair that was ready for the roller and roll it down, now I have to roll up.
If your wearing your hair in curls since it's neck length I would roll I an angle too. Not doing the traditional Mohawk roll but start at the back and do rows. I used to set my cousins NL hair like this , when the hair is dry it will come out looking like the curls are dropping or falling already rather then looking like a grandma lol
I hope that helps but if not I can try to explain something better if you want
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I may lightly blowdry or something cause Im over it. 
