QUOTE(Dead-ed @ Apr 29 2019, 07:56)

I'm bad at math, but i think you should consider the diminishing return at high base damage, like beyond 11k or so. Butcher is good for weapon with high damage & if the overal set has low damage, like shade. Fatality might be better for power set.
You're forgetting that 2H's ability is +30 base damage, unlike 1H's which is +50. Furthermore, a 2H has way more ADB than a 1H. In other words, 2H's base power relies much more on the weapon.
So if anything, the remark about using Fatality would rather apply to 1H more than 2H. Especially when it comes to rapiers played with a full power of slaughter set.
So when it comes to a Longsword+power of protection set, Butcher is pretty much the obvious choice... after Overpower.