It sounds like you already decided, but if she is 10 and you guys want to skip characters entirely (which would be my recommendation, with time short), I would second isabellea -- do a big first day in MK and then either AK or DHS, depending on what rides/shows look the most fun to you/her.
MK is great but you really can do most of it in a big, fun day, if you FP Space Mountain, SDMT and either HM or PPF from late morning to early afternoon. Knock out all of Frontierland and Adventureland at rope drop, then use your FPs while sprinkling in lunch and few anytime rides, then keep refreshing the 4th FP to do Pooh, Dumbo, Barnstormer, Little Mermaid, Buzz, etc. Each time you scan, start refreshing for another.