A couple of quick questions (especially since you are saying you only have one day at MK). Are there morning or evening EMH on your planned day? Are you staying onsite?
If there are EMH for you, I agree with the PP: go for rope drop and hit the headliners you were not able to get fast passes format you are interested in. Keep in mind, only Tommorland and Fantasyland will be open for EMH. I'd pick 7dMT first, then head west riding no-line rides working my way toward the rope that will be at the Rapinzel Bathrooms. So, Pooh, Peter Pan, etc. Then, I would be at the Rapinzel rope by 8:50 or so. When that rope drops, you can go to Haunted Mansion or head around Fronteirland to BTMRR and Splash. You should be able to get on those once or twice each in that 2nd rope drop with almost no wait. This will take you up until about 10:00. I would schedule my fastpasses starting at 10:00 in Tommorowland. I'd walk through Liberty Square, cut across the hub, and head to Space Mountain (FP) Speedway (FP) and Buzz (FP). Also, if you need to spend time between FP, you can usually get into Monsters, Inc without a wait, and you can always do the TTA People Mover, or C of P with no wait. Then, after your Buzz FP, you are close to the set of Kiosks near Stitch's Great Escape (which probably also won't have a line, but it is a terrible attraction IMO). Book your next FP there. If you are in a large group and are struggling to find a "soon" FP, break up your group and schedule overlapping times. It is unlikely you will have to wait for any more than a couple of minutes at a kiosk. There are (I think--trying to picture it in my head) 4 kiosks at each of the locations, and in my experience, there was always one open any time we approached them.
Using this strategy, you will likely find that 1). You will get a lot of headliners done before you even start to need your fast passes. Barnstormer, 7dmt, teacups,pooh, Peter Pan, Ariel, can all be accomplished in the first hour without using a FP if you get to 7dmt first with little or a 5 minute wait. 2). You will get to ride the headliners in Fronteirland without a wait as well. 3). You can book your one at a time FP to do others: Jungle Cruise, then head to the kiosk by Diamond and book a FP for Pirates, etc.
You may find you get enough done this way that after 6 or 8 FP, you are ready to just tour casually.