Hmm...I don't want to be a buzzkill again, but I'm really not sure if this is worth the risk
we could exchange the plants for sex toys, which is nice, but not really needed
as for the light, we already had a whooping two gathering spots on this floor. I think the chance of finding another one is slim.
On the flipside we already discovered a trick bridge, have extensive knowledge of the enemies here and, most important of all, a long rope.
Eh, oh well, lets go for it.
So, underground water tunnels with strong currents and murderous predators. Lovely place we are having here.
First off, I still need to know which one of you is capable of swimming. Please take your equipment into account here.
Second check the ceiling. Unlikely, but lets just make sure there aren't any slugs here that could drop on us.
third, I need you to check the water surface. According to what we learn from the museum Deep Sniper's are identified by small bumps on the water surface. I imagine they will go for the weakest target, so tying a Rope around Goma and having Cherchiel hold on to the other end would definitely be beneficial.
Now for the bridges, the obvious course of action seems to simply check the other two bridges as well. If we rope up Isalia, there should be no danger of her falling into the water.
I am a bit reluctant to "rope" everyone up, because this could just as easily end in disaster. especially if we are forced in a fight.
Once the bridges are secured we should slowly make our way over. Providing we don't learn any additional information about which bridge is safe and which isn't, I would pick the left bridge. I do think sending one person roped up over first is the wiser course of action, but I would pick Isalia instead of Goma. Goma is small enough that she might not even trigger the bridges mechanism. I also worry that she would make an easy target for a Deep Sniper. If Isalia does get attacked, she can just cut the tongue of while the rest of the group plays tug of war.
If by that point there are still no complications(very unlikely) we should head to either the plants or the light, whatever is closer.