I'm curently working on becoming champion of all the horde cities, when you become champ of a city you can't do the valiant dailies for the one anymore. What I suggest, if you want the crusader title is to keep doin dailies for the valiant till close to fully revered that way its easy grindin to exhalted. After you get close to exalted then turn in and become champion then pick another city and start over. Once all of the cities are at champ status, then NO you cannot still do valiant dailies!