I only tackled the first jaggie on both sides of the inside of the curve, as I assume that's what you wanted. I used 25%, 50%, and 75% grays. Note that hue doesn't matter too much so it shouldn't be too hard finding colors that are usable without having to add new ones, in a colored piece.
It's very subtle, but I think it works, the jaggie is no longer noticeable. You don't want to overAA, anyway.
I'm far from a pro, though.