I would hit the big ones first thing right when they open. Studios - Despicable Me, Transformers, Rock It and I would do HP in the evening. For IOA - if you are okay riding single rider on Harry Potter do that for sure (we walked straight on and the line time was 120 minutes). We have a 8 year old but you get off right a child swap and he knows to wait there. SpiderMan and The Hulk are the other two that get packed fast. Another trick we learnt is from Despicable Me was if the park closes at 10 and at 9:30 the wait says 90 minutes chances are it is not 90 minutes. We had express and it was 8:45 with the park closing at 9. The wait time said 60 minute for the normal line. We walked out at 9:05 and there were sending in the last bunch of people.
I also do agree on the single rider line. SpiderMan Single rider was walk on, The Mummy has a short single rider line normally. You can alot more in the single rider line for sure.