Hmm, Brassy is an awesome colour and pairs fairly easily with a variety of colours. I think someone did an awesome FOTD of this recently with Cranberry? Anyway, I saw it somewhere and it looked devine.
I love the way it looks with Brassy in the crease, lined on lower lash line and Beig-ing shade stick. I also like Brassy on the lid with a darker colour gold in the crease (there are many you could chose from).
Play around with it. I haven't tried it yet but always thought it would look nice with a metalic blue worked into the look as well.
HTH - sorry I can't give much else!