Yesterday, I was invading a guy in Oolacile with about 2000HP, a lot of poise (he didn't even stagger with three Murakumo R1s) and he kept estus-ing every time I hit him. He used a katana (can't remember which one) and a greatsword Eventually he won and I had the idea to make a similar build, perhaps even worse. That's only a prototype, and I won't make a new character with that, I just found it interesting.
