I'd avoid ballet flats with the zipper---unless you found seriously warrior-ish flats with spikes on or something! Or maybe alligator print...
I'm hesitating over oxfords too---needs a specific *genre* of oxfords again. Tougher, less classic, but maybe not too RATE I think.
Gladiators or cages of any sort, or what Suz once called ur-sandals would be perfect (you know, thicker 'serviceable'-looking straps, a pared-back aesthetic in neutral leather, minimal but not barely-there by any means...)
I don't think you *have* to have heels as long as bit of bookending or 'nearly nude' or colour continuity (navy?) is going on. Because I find flat-colour skinnies, even cropped ones, bright ones or faded ones, less choppy than a wider leg or print, y'know?
