I love a good combination of rose and oud, and, fortunately, there are a lot of options to choose from. Does your friend like her/his oud making a bold statement? I would consider the Montale series, then. My favorite is Montale White Oud because of the dark saffron. It is a very inky rose in there--a rose blooming in the night.
Amouage Epic Woman is worth a sniff--the oud is less "medicinal" here, but still has a good presence.
I was initially enamoured by CS Dark Rose, but it is very linear, and I became quite bored with it. It's a good scent, though, and I like the rose there.
Micallef Rose Aoud is a fruity rose-combination. It's almost yummy. I like it.
My fave so far has been By Kilian Rose Oud. It is quite sweet, so please keep this mind in case your friend doesn't like sweet scents. The rose clearly dominates the oud, and the oud is very subtle. It doesn't have powerful sillage, but it clings to my skin forever; it is more of a skin scent for me. In fact, I am trying to find someone to split a bottle of this one with me...