In theory, nothing would be more efficient than continuously booking LLs for immediate use and tapping into them. However, most attractions will not have that option available for most of the day, especially the more in-demand rides. This means you will have to book LLs for some point in the future and fill your time doing something else until your window opens. Being able to book 2 LLs at a time would represent a huge advantage here. It’s essentially like having 2 G+s linked to one user for the rest of the day, with the caveat that you still can’t book any ride more than once.
I do wonder if this is kind of the play though if you are looking for a mid afternoon break.
Rope drop either 7D or space.
Instant LL ride Buzz , Speedway, Tea Party, Pooh,, Dumbo, Barnstormer, Mermaid, small world all by 12ish
At that point JC should be around 3-4pm, so book it and head back to the resort for a break
@2pm Splash Mountain should be around 4-5pm
@4pm or when you tap into jungle cruise, Pirates probably has one about an hour out
When tapping into Splash, grab Big thunder
When taking into Pirates, grab HM
Get on either 7D or Space at close
Basically use Instant LL in the morning, then bounce between the bigger rides (JC, Pirates, Splash, Thunder, HM) while you can be juggling 2 of them constantly.
EDIT: Better plan: Rope drop 7D, First FP (booked early) for PP around 9am, then follow all the instant LL Would be a complete waste to have a small world FP at 9am.