What's your family's priorities? What is a must do? Are you going commando or leisurely through the parks?
Agree with this. Need to give more details. It'll be easier to give suggestions.
For example, I completely disagree with people who say going 6 days in a row is too much and you should have resort days. We do 16 days in a row. However, we aren't commando style people. We don't rope drop, we don't close the parks all that often. Our typical park day would be 10am to 4pm or 3pm to 9pm. Doing that allows us to hit the parks each day without wearing out. We're there for WDW, not a hotel/resort/condo/whatever. So to us, staying an entire day at a hotel is a bit of a waste. But you have to decide how you want to do it.
July isn't a very busy time, relatively speaking, so that's always nice. It's hot, and there are pop up t-storms. You may get them every day, you may not get any, but just plan for them to be sure.
As for breaking up the parks. First, if I were arriving late afternoon I'd definitely hit a park that day, so you'd have 8 park days. If I had 7 days, I would do 2 MK, 2 HS, 1 Epcot, 1 AK, 1 water park (if you want to add that option or have it, if not I'd add another AK day)