[Sawrock]

So, Rustic works for Doomed Status Infliction bonus, as it is a Doomed-type curse. However, Haunted Soul, the other Doomed-type curse that is found on spectre swords, does NOT work with the Doomed Status Infliction bonus. In addition, it does not work with Dark Invasion. The following is from two fights, one with my spectre sword, and one without.

(With Spectre Sword with Haunted Soul (Doomed))
Resist! Terror Goblin Spear takes 11 Earth damage.
Terror Goblin Spear takes 24 Darkness damage.
Status Infliction: 148 VS Status Resistance: 32
Terror Goblin Spear was inflicted with Poison!

(Without Spectre Sword with Haunted Soul (Doomed))
Resist! Mad Vine takes 18 Earth damage.
Mad Vine takes 26 Darkness damage.
Status Infliction: 148 VS Status Resistance: 21
Mad Vine was inflicted with Poison!

As you can see, the status infliction is the same. I should be getting 40 more status infliction (10 from half of Dark Invasion, and 30 from having a Doomed Weapon).

[Sawrock]

Just to also note, Sayakana works normally with Haunted Soul.

[Neus]

Is the Spectre Sword your main hand weapon?

[Sawrock]

Yes, it is my main hand weapon. My sub-weapon is another sword (a divine galdric golgorth).

EDIT: Ambidexterity is why it hasn't been working.

[Neus]

This should be corrected then.