Superb concept sketches! If you are trying to decide between these three, I would definitely say 2 is perhaps the best & most interesting design (not to mention authentically tribal style), with 3 being the next best. To me, number 2 is very reminiscent of the first-nations clothing style of Russia's Kamchatka peninsula, as well as the Inuits of the arctic circle.
Wow! I love all of them, but I do think I like the second one the best. It's very original and I immediately know that she's a goddess. However, I really enjoy the sort of natural feel of the third one. There's something very...real about her.