Great update! Don't worry overmuch for the length of the chapter, we enjoy it greatly anyway.
I doubt we'll get yet another site at the 3rd threshold, so we already know which places are available for the cultivation plan next turn. And just on time, we barely had any bonuses to assign to our first 2 plans. There were only the Silent Moon Stones and the Argent Vent, if I remember it rigth? Or there was a 3rd place?
The math cabal is going to have fun discussing the optimal combination of projects and sites.
Now onto the vote. This is one of those cases where reality reassets itself after the vote. So let's review each option.
With the water option we will likely face the siren queen or something similar. I'm confident in our chances in that case. As Sixiang said, we are an eagle between hawks. As a plus, it will most likely be a spiritual/illusions battle, so the risk of damaging the site will be minimal. I really don't wanna piss off the mighty sunstone spirit.
But it's also possible we have to fight off against a predator of them. Less likely though, I believe. The atmosphere of the place was too tranquil it to be a big predator's hunting grounds.
In both cases, there is a good chance of turning the luring spirits into our subordinates, which really fits our theme. Hanyi could get a chorus!
The ceiling option could be anything, really. A wind spirit, a giant spider, a pack of cave predators, a baboon gang. Who knows? Anyway, it sounds a lot more brawly than the other option. Not really feeling it.
So:
[X] Water!