Conclusion: Terrible, terrible boss.
Entire fight is waiting to drop stigmas on him. You can't LR because if he leads with his dumb left foot you're 100% guaranteed to eat it.
My defense totally saved me because I got greedy a lot and ate this left foot when I tried to use LR.
The only time anything else is used is when he is weak/down, at which point it's time to spam butterfly swing.
I think Ingkells is more interesting. I'll be trying him again later. It will be will a hammer since I no longer have a sword.
Weapon is +10 Ornate Maelstrom Chiulin Hammer. No, my set is not fused. I really am wearing a full Shining Will set.
Stats:
13881 att
9876 def
60 crit res
65 bal
30 aspd
47 crit