Anywhere in the mezzanine over anyplace under the overhang.
Frankly I’d go with mezz over orch almost anywhere just to be safe. The front mezz is almost certainly the ideal place for this show– but I’d also have a hard time believing that you can take it all in from the front of the orchestra. There may well be a sweet spot to view it from downstairs (just guessing, maybe F through L?)- but personally I’d go with upstairs over almost anywhere else for this one.
No it’s actually not quite like Great Comet in that the actors don’t wander all over the upstairs throughout, let alone sing entire songs from there. But the set is so vast, the show such a spectacle, and the staging so dependent on multiple levels (and having a good sightline from the audience) that I think the mezzanine is the best place to take it all in.