Here’s the kicker… that’s the simple option! You can do loads more I think.
Start with - The Genie Thread! All WDW Info Here - #400 by Jeff_AZ
So following your example and this start with SDD for 2pm then at 11 book your MK OPTION FOR AS SOON AS POSSIBLE anything is fine… wait till it expires and book another MK one for ASAP then get on the ride within the grace period… as you have tapped now use that to get another lined up at HS then go to your MK ride again let it expire and book another MK ride… tap into it during grace period and get another HS lined up and so on.