Rubber brake pads work better than cork, especially in the wet.
I don't think you should race and train on the same wheels for this reason, and because the wear and tear is expensive. The Al or ceramic strip to the rim adds substantial weight. For that reason, I'd stick to full carbon setups.
Why don't you buy an extra set of pads and swap them on before the races and then swap back to rubber pads and training wheels for the week?