So I completed Dawnguard a few days back and I've been using my Ancient Falmer armor. I was wondering if there was a one handed weapon that would go with the armor and Auriel's shield. If you use the armor set, what weapons do you use with it?

I've been using a dragonbone sword and occasionally Dawnbreaker, but I was looking for other ideas.

I think any of the Elven weapons go naturally....I've been using the crossbow as of late.

Dawnbreaker
Auriel's Bow + Shield
Chillrend
Any dragonbone weapon

And any other weapons that promote holiness and light.

I agree with you.
Also, Dawnbreaker would be cool with it.

How about a Falmer sword?

Ancient Falmer looks nothing like regular or hardened Falmer, you see.

Chillrend? I mean its glass(which is elven made I think), blue, and has this whole "ice" thing going on.

And a fur hat.