Yes, go with the guideline for support. Have you filled out an Income and Expense Sheet. Don't lie, but make sure you put in good numbers, the kids get to be more and more expensive as they grow up..trust me! Daycare expenses will be how much longer. And make sure that the daycare expense is a separate issue...NOT PART OF CHILD SUPPORT. Because once daycare is done other expenses will start to incur, such as sports, school activities, camps, GAS driving them all over, driver's training..all sorts of stuff that change as they get older.
As far as custody, think ahead when they enter school, winter and spring breaks, three day weekends, birthdays, holidays..switching every other year or splitting the days seems to work. Be cooperative but don't give anything away. By the way, how many children and how old?