[GMJoeSolarte]

assuming your not giving him the Army BSB, which I believe the Noble is the only one that can do it. Specifically there are two banners more then 50 points in value which only he could carry, one of them being VERY good and worth of being taken.

 

[GMJoeSolarte]

if the Reaver Bow is the one I think it is, it is 40 points, allows 3 S5 LongBow shots per round at the same target or different targets. In the hands of a Noble or Prince I would say it is worth taking.

If it's the one that costs 60 points, then you are essentially getting an extra bolt thrower out of it (S6, penetrating).