We've always done the Universal side first and then IOA and WWoHP.
We can usually get through US by 12:30 when we get there at opening. This is by attractions only, no shows, beverages only and of course a washroom break or two. We've never found a need for Express Pass either, you might not either since it shouldn't be super busy when you're there.
Soon as we get to IOA we head straight to WWoHP and do single rider line for FJ. While we don't always get to ride together, sometimes one or two of us together or sometimes all as singles, doesn't matter cause you can't even see who you are with on the ride due to the way the chairs/restraints are designed. After that we'll get lunch at Three Broomsticks, then probably back on FJ once or twice more before continuing on with the rest of the WWoHP and the remainder of the park.
Works for us .... might for you too.