I can't imagine that there wouldn't be some interaction between Helen's organisation and the fae, especially since Helen runs all sorts of aid to the Changeling Network. They can always meet on neutral ground to discuss things. Chess in the park? A walk through the Botanical gardens?

Sometimes you need alternative options when it comes to precautions being set in place. Helen likes to have precautions for her precautions' precautions. Perhaps there's also a sort of barter/trade to be had as well, though that's fairly dangerous when it comes to fae. Medicines/potions/ingredients (so Strange will calm the hell down)?