This literally has the 'Cruel' prefix on it already. So I have no clue what you're both even talking about.
As far as the 'Cruel' modifier goes its literally 3% off of perfect.
While you are technically correct, the cruel mod is 200-300ed. However, when people refer to a weapon being a “cruel” weapon, they are referring to a weapon with cruel + masters mod which gives it up to
450ed.
When people refer to a fools weapon, they are referring to a weapon with cruel + fools mod which is up to 300 Ed and .5 max damage per level / 16.33 AR per level.
The big issue with this is that the damage to demons doesn’t count as on weapon ED%. That demon damage takes a prefix slot which could be used for 2 sockets, of which a second Lo rune or a 40ed/15max jewel or a 40ed/15jewel or Ber rune which would be significantly more damage than the ~100% demon damage.
No matter how you slice this, this weapon isn’t better than easy to get options such as ebotd and wasily outclassed by a basic 30+ ias/400+ ED eth weapon , which is extremely easy to get.
The math picker laid out is littered with incorrect statements.
D2:R