Phantom, Hadestown, and King Kong have afternoon shows in addition to evening shows, so if it's possible for you to go to two shows, you could rush two shows in a day to really optimize the amount of time spent. I agree with Daniel about Ferryman, and the rush will probably be less competitive than Hadestown. I also really loved Ink, and that rush is online (on the TodayTix app) so you wouldn't have to wait in line at all.
If you're from New York or come to New York often, I'd say save Phantom/Chicago/Mockingbird for another time because they'll probably still be around after a year. Hadestown too probably, but it depends how much you want to see it sooner.