Re: What type of polymer to use for sculpting?
I haven't done any polymer clay for several years. And the only carving I did was on Premo. It worked out fine but I wasn't actually sculpting a figure like you are.
You mentioned Blue Bottle Tree. I remember I saved an article of hers on Sculpey Soufflé. It's a great article. It's called "Working with Sculpey Soufflé - A Review."
I can't quote the whole article here, but it has tons of info that might be relevant to you. But here is one quote:
"Sculpey Soufflé is a novelty clay, not a workhorse. It is fun, it has a lot of wonderful qualities. And for some techniques, I think we'll find that it will turn out to be the best clay on the market. It is certainly the first clay that I recommend for people who are makng figurines..."