Thomas Jefferson said: "I'm already seeing Freestyle Live Supreme on a Saturday at 5:00 PM and then Phantom at 7:00. Do you think I'd have time to squeeze in a 1:00 PM show of Lehman? Freestyle is 80 minutes so I know that would give me enough time to get me to the Majestic, but will I have enough time between Lehman and FLS to get from the Nederlander to the Booth? If I'm able to then I might be able to see Mockingbird the next day."
I think you can make it work. IIRC, Lehman runs about 3.5 hours, leaving you 30 minutes to get to the Booth - probably a 5 minute walk.
I know this is not related to the initial question, but I would also give you a slight warning: Freestyle IS liable to run long. It ran about 1h40m when I saw it, and I wouldn't be surprised to hear than it ran longer other nights. Assuming it will be a phone-free experience again, I would highly recommend wearing a watch, so you can keep an eye on the time and duck out a bit early if it comes to it. Having said that, The Booth and the Majestic are quite close to each other, as you know, so even if Freestyle runs long, it's unlikely to make you miss the Phantom curtain time.
Also - are you making sure to account for food in all of this? The last thing you want is to have your 3-show day ruined by low-energy and a grumbling stomach (I know from experience). I'd recommend bringing plenty of substantial snacks, and if you need to buy dinner, plan out a quick grab-and-go spot nearby, because timing could be tight.
I think it will work out nicely, with Lehman, being the most difficult show, coming first, following by Freestyle as a nice pallet cleanser, followed by the more serious-but-digestible Phantom.