Obviously the FPPs listed are ones that you would "like" to get. Unless I missed a major news story, there has been no official information regarding Pandora FPPs, other than the assumption that both rides will have them. There are rumors that AK may go to a tiered FPP system similar to what EP and DHS are using.
You will be there 3 days after Pandora opens. The park will be crazy busy; tons of people will be pouring in to see Pandora, and will then filter out through the rest of the park. I don't know what CL TP currently has indicated for the day, but I would assume it's going to be a 10. TP has no "real" or historical data to use for something like this as this is the largest single opening that WDW has had in years.
Six min for the River Journey right at RD may be realistic - as long as you are at the verty front of the RD pack - but keeep in mind that the RD pack may start growing several hours before the park opens. I think most of the times on you TP are unrealistic considering the special circumstances. The same goes for eating times; I can't imagine that you will be able to order and eat at Pizzafari at the height of the lunch hour in 30 min. Your walk times may also be longer; I would expect the relatively narrow paths in AK to be very crowded and maneuvering through them - especially if you have a stroller - could be challenging.
You haven't specified what ages are in your group, but based on your ride selections, I'm assuming it's mixed, with at least one small child. Many people would say that 8-plus hours, straight, without a mid day break, is a recipe for a melt-down disaster. Have you considered touring until 1:00 or 2:00, taking a break until 5:00 or 6:00 and then coming back? Seeing Pandora at night is supposed to be spectacular, plus there's Rivers of Light, the street entertainment, Tree of Life awakenings, etc.
I'm not trying to be a "Donald Downer" here, but I think you need to be prepared for what you are getting into.