Hmmm. I guess I'm not really all that surprised about how this has turned out, but...I don't know. I guess it makes sense that so many people are voting for Mistborn, since that was a trilogy and was therefore able to delve much more deeply into the extent of the magic, and such. Whereas with Elantris, it got a fair bit into the magic, but we don't know exactly what each Aeon does. We don't know how fast some Elantrians could get in drawing Aeons if needed to draw quickly....
I'm inclined to think Raoden, given a few years, got get very adept and quick at drawing the Aeons. Quick enough to, like Kaz says, throw up a shield and deflect coins shot at him, or even turn those coins into something else--like feathers (I still can't remember which Aeon it is that changes. Anyone want to help me out here?). I also think he could draw two Aeons at the same time. Yes, this would be difficult, but no more difficult than learning how to play the piano or any other activity which requires both hands doing different motions....
A Raoden like this, I think, would be able to take down Vin fairly easily, while Dilaf/another Dahkor monk distracts Sazed/another Feruchemist long enough for Raoden to take care of them...since, let's face it, the Dahkor monks can't do nearly as much as the Feruchemist can.