As long as Super Sculpey is baked it is a lot stronger than paperclay will ever be. I've seen plenty of people test string polymer clay without problem.
If you'd like to become a member of a dollmaking forum, there is The Joint. It's a great source of information and it might be of use to you. www.denofangels.com/joints
I don't mind gettting questions about doll making at all! It's a wonderful hobby and I like it when other people make their own dolls.
Good luck with yours and hopefully you'll be able to join The Joint soon.