MiM to Sales and Trading in IB

I completed a social science degree at the University of Toronto. I was pretty law school focused in undergrad, but I've recently been interested in a career in sales and trading. So I'm wondering which, if any, MiM offerings could land me in Sales and Trading despite my background (no financial internships, 1 year WE in research). I'm currently looking at applying to Duke, Georgetown, Kellogg, Booth, LBS, Imperial, and LSE.

I understand that Duke has the +1 year MBA option for top performing MiM students, so I'd aim for that if admitted. Though I'm not sure how useful an MBA is without any work experience..