Back to design 1, with small tweaks. This is probably what I'll be going with.
I knew from the start that I wasn't going to change her design radically, but wanted to play around with very different versions of her outfit to see if anything would stick better. Small things stuck from each one, but overall it's just a revision to her staple design.
Design 4 was pretty good though. Might use that for another character at some point.