Translation:Quid nos facimus?
Will this translate as What are we doing? or as What are we doing to us?
I think the answer to that is that nos is the subject. You can leave it out and that would not change the meaning of the sentence. I think "to us" would be the dative: quid nobis facimus
Wouldn't "Quid facimus nos?" be acceptable too? Just curious, never seen that construction before for questions.