Been practicing the first couple turns in co op and using the same setup I do not have the same damage needed to clear the 15m turn 5, even with double strike on fed and lich having enough bar to ougi. Is it due to other people's summon debuffs or something?
The sub-all character can be anyone, as long as its sub-all. I find Seox to be a bit awkward as if you do not clear 60hit omen, Seox is kinda a burden as he won't be able to raise his stack beside Ougi, even then he cannot dodge and stack is dropped again. Also Skill > Full Chain > Qilin. Compared to Full Chain > Skill + Qilin > Full Chain > Skill + Qilin. So, yes you can use Seox but you're burning gas much faster. Here's a Seox POV but Hades ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-bOz_WhsyIOs.html . Though I would still recommend avoiding Seox for most players. Other alternatives can be Orchid (She helps you do damage with 50% Ele Up on Dirt Tenet 10 and reset S3 on Ougi making it pretty reliable, just don't use Orchid S1 as it will make her weak as the shield is easily popped) A more detailed explanation on nighthound setup can be viewed here docs.google.com/document/d/12Ws45Wlj7D7ulo090B71C3k3iCJ4N1BTW1SA0qT_LLI/edit?usp=sharing
Fediel S2 is 105,000 per hit, and agonize is 100k supple, effectively a 100% skill cap (kinda) Lich Passive Nuke is 135,000 per hit, again agonize is way more dmg than any amount of skill cap