>>56313751Ranking on Lapis is harder, but most of the sleep styles that have higher mane wields have lower rank requirements in Lapis. So it might be worth it if you can hit 8 spawns on the first day (there's also the big Snorlax to help with that).
But the real reason to stay away from Lapis is because Wooper doesn't spawn there. I might be wrong, but I'm under the impression that Wooper is a fan-favorite mon, so they'll want to make him good like they did with Gardevoir.