This is a fun idea. I say that team size on final stage should 4, just because there's the possibility that a team wins yellow, points, KOM, and young rider classification with four distinct riders. Then it would be a shame to throw someone out. How big team start size should be, I don't knowLet's go in the other direction. After each rest day, max team size decrements by one. So if no one in your team crashed out yet, you pick someone to send home. That way everyone who's still riding has completed all the stages, but if you lose a rider on day one your disadvantage eventually resolves.