Warrior/Knight Help I Need Help Improving This Build

I tried to make a tanky cancelstack warrior build, and this is what I came up with: https://wynndata.tk/s/jl0ca4
I'd like it to have a bit more defense if possible, while still keeping decent damage and walkspeed, and enough health regen/lifesteal to survive

for those who don't want to wait for wynndata to load:

necrosis
hetusol
writhing growth
nether's scar

flashfire knuckle x2
flashfire gauntlet
contrast

skien's madness

(thanks to Emogla3 for the inspiration for this build)

 

already a very solid build, but if you swap one of the ff knuckles for an old keeper's ring you get the funny triple sustain

 

11 tier cancelstack question mark?