Anywhere between 3-5 on, 1-off is fine. Don't go bananas on the carb up! If you are eating plenty of greenery you will still be quite low carb but taking in adequate base to balance th eacid of the protein.
Charles Poliquin has worked with Mauro DiPasquale extensively..here is a great article from Poliquin's Nutrition Dude:
pay special attention to the protein recomendations. Right i line with the Zone.