Another approach would be to *deliberately* elicit a bitch shield.
If you go with a traditional opener -- "Hey, can I get your opinion on something?" -- you don't know whether she'll deploy the bitch shield or not. Lacking control, you may not have as much confidence, and you may freeze up after she responds, as you think through the appropriate way for you to respond.
But say you dangle some bitch bait, like my Jesus Christ opener:
the-jesus-christ-opener-vt118641.html?highlight=
Then you can be almost certain that she'll try to blow you out, and so you can devise a second phase of the opener. Then you can be much more poised in that moment. You're in control.