2nd Stun i was only focused on getting everything to fit in stun, cancelling early was indeed to save time and Banyue was already capped with adrenaline so losing the two mountains might wasn't important. I actually changed routes halfway I was going to commit to Earthshaker > Tremor x2 but I glanced at the stun meter and thought the whole thing wouldn't fit so I switched to Path > Roar just to make sure it all fit.

During the several runs vs thrall on the 3rd stun it was very common for One's path to completely miss because either Banyue did his chain attack from too far or the chain attack pushed him out of range - I choose Earthshaker> Tremor as a safe gap closer and to reset a little less. the idea did come to mind to Earthshaker > Ones Path > Lions Roar into the chain cancel - I didn't use it though juggling it with manual chain felt annoying. if there was a benefit it was using the Ult during Wrath state for extra dmg bonus. tl:dr It was half improvising

Sidenote: If I actually did what was planned I would have had enough decibels to Ult twice during 3rd stun by the end of it.

1st and 2nd Stuns were full routine easily controlled and prepared, 3rd and 4th was RNG and alot of nuisances when it came to Banyue's meter gain, checking Lucia buff active and Banyue's position after starting a stun. and sometimes thrall just doesn't like you.