Well, okay..I was going to answer this thread 11 hours ago, I was intimidated to, since I only the basics of this stuff. Plus, I don't know how orbs work, just yet.
So far we know this. Staves do not give any bonus magical damage. It's the options on it that may be helpful to you. But all staves give a +5% magic accuracy. Personally, I would just go find a nice dagger in the beginning, since you can use a shield with that. Later on in the game, if you can get a nice staff, you may use that.
About orbs, I honestly don't know. I haven't played that far. But I know one thing, orbs makes you levitate when you run =D!