it would be the exact same here, so unless those swords with a range of hundreds of meters have ridiculous AoE or are several blitz amps above Shunguang's own combat speed, then they would realistically never land a single hit.
they do in fact have massive AOE. they're pretty compact together and cover a massive area, so i don't think zohakuten's gonna be UI weaving through them all. granted, they aren't going to be able to kill him on their own, but they can apply pressure, which means zohakuten's either gonna have to facetank them and regen through them or rely on his wood dragons to block them
shunguang being way up in the air still means that she doesn't really have to worry about any of zohakuten's attacks actually hitting her, so the big issue is going to be whether or not she can reliably take down zohakuten before she loses the war of attrition
i already brought up the massive AOE nuke which could potentially take out both minitengu and zohakuten in a single go, but
shunguang's spatial slashes on their own also have a massive range and cover a pretty wide area. zohakuten trying to protect himself with his wood dragons shouldn't matter since spatial attacks should be able to slice through all of them like butter. if minitengu is on zohakuten's person then she doesn't really have to worry about figuring out the minitengu weakness if she just completely eradicates both of them in a single go. and it's not like her spatial slashes have a cooldown to them,
she can chain them back to back in rapid succession. it's very possible a single massive spatial slash just completely takes out both zohakuten and minitengu simultaneously
if minitengu is separated and away from zohakuten, then it becomes a lot trickier, but i think it might still be possible for her to deduce things.
yunkui summit's perception technique allows for the ability to tell "real people" from fake, as in the case with the drowned ideals, so you could make an argument that it'd be able to help clue shunguang in on the fact that zohakuten isn't hantengu's "main" body. even if you don't wanna assume that it'd be able to straight up show shunguang that zohakuten isn't hantengu's main body though, then i think it's at the very least likely that it'd clue her in on the fact that zohakuten is made of two separate "entities" with separate ether traces
if shunguang sees zohakuten actively going out of his way to protect something via a wood casing, it's also possible that she might just assume it to be similar to an ethereal's ether core. they're the weak points of ethereals within ZZZ, and stronger boss ethereals have unique ways of protecting/covering their cores to prevent them from taking lethal damage, so if she sees zohakuten encasing something in wood and guarding it, it's not unreasonable for her to assume "oh, this monster might have a core/weak point similar to an ethereal, i should target that." especially if zohakuten is just continuously regenerating from all of her attacks with no signs of slowing down
if shunguang is at least aware of the fact that zohakuten is two separate entities, then even in the event that minitengu breaks free from the wood casing and starts to flee in a different direction, i think she's smart enough to put two and two together and at least assume that both of the ether traces are connected somehow. and given
the perception technique also allows for the ability to track and sense ether trails, she shouldn't have that much trouble tracking down minitengu even if he tries to run and hide. obviously killing such a tiny figure is a lot easier said than done, but with her own agility + range + massive AOE i think she can do it, especially if she at least knows the general area he's in.
plus the revelation technique also allows shunguang to sense and find hidden objects, so she should be able to find minitengu even if he's hidden
