Whoaaa! Amazing run! I just saw your channel and seeing SnS AT Velkhana runs is always fun. Also that moment at 3:41 where you used Slinger Burst into Perfect Rush while Velkhana uses that attack is so cool, I need to try doing that sometime
that 3:41 is definitely my favorite punish! but it's not possible to do with bigger sized velk because she jumps farther away so you'll end up getting hit by the ice pillars
backstep from sheathed weapon? its (R2 or RT) then immediately tilt the joystick to the opposite direction your character facing and (◯ or B) button at the same time. i have no idea for mouse and kb sorry 〒▽〒
For mouse and keyboard, I backstep from (sheathed) by pressing the block key and immediately following up with the inputs for backstep (S and Right click I think), if you press S long enough before the mouse click, your character will backstep in the OPPOSITE direction, very niche and annoying most of the time so keep it in mind
I also want to add that you can use your special clutch claw move from sheathed by pressing the block key > roll > c (or whatever your clutch claw key is) hope this helps