I'd probably get rid of the carapils- more crystal isn't needed, especially with the flaked wheat. Otherwise, the malt looks good.
I'm unsure about the hops. You're not adding hops until 30 minutes?
I don't like galena for flavor hops, but I like it for bittering. I think the saaz will get "lost" behind the columbus (which is much stronger flavored) and amarillo. I'd probably change the hop bill quite a bit. If those are the only choices for hops, and you want to use the columbus and the amarillo for flavor/aroma hops, I possibly would do:
60 min (1oz 7.4% Cluster)
15 min .5 ounce Columbus
5 min (1oz 7.5% Amarillo Gold)