I'm not speedrunning, but it seems like the kind of thing you guys would know. I've tried the Omni-Ubiquiti Nets and they don't work on sumpter beasts. My last attempt at just killing everyone else resulted in the sumpter beast getting killed in the crossfire, and I don't want to try that again unless I know it works. I'm in step 10 of Make Bright the Arrows, Gather the Shields... (https://genshin-impact.fandom.com/wiki/Make_Bright_the_Arrows,_Gather_the_Shields...) and the wiki says it's just a Pyro and Geo skirmisher, but there's also a sumpter beast. Does anyone know some kind of glitch to keep the sumpter beast from spawning or to let me win without killing it? Or at least a good way to kill the skirmishers without it getting in the crossfire?

Edit: I killed the skirmishers without killing the sumpter beast. That didn't work. Maybe there's some trick to keep the sumpter beast from loading?

Apologies for replying to this a month late. Sumpter beasts are not a capturable creature for the Ombi-Ubiquiti Nets, likely due to being too big. I don't know exactly what you're trying to do, but Sumpter Beasts when spawned with a group of enemies are immediately considered as an enemy and will aggro the player as well so the fight will not end until you also defeat it. As far as I know there is no way to prevent the Sumpter Beast from loading or at least not in that specific quest. Hope this helps clarify anything

I ended up just having someone else do it. I was able to use multiplayer mode for Make Bright the Arrows, Gather the Shields..., but that didn't work for Dehya's quest, and I got my brother to do that part.