Invisible Blade Class Weapon Question

[Kazerthan]

I was working on a build involving the use of Invisible Blade, but I am not sure if this is something that either I am missing or not coded properly, but I read on the wiki that IB skills could be used if a class weapon was equipped in one hand and the off hand empty (this is for the AC bonus to Parry). I tested this with a Rapier and Longsword but neither of these weapons would give me the IB skills. I was only able to determine that the Kukri, Shortsword, and Dagger could give me those. Is this correct or will there be a fix in the future planned for this?

[Drowboy]

"Dagger" -type weapons only for them.

[Kazerthan]

"Dagger" -type weapons only for them.

That makes sense now. When I was reading Class based weapons I was going off the Rogue weapons.

[Freyason]

From wiki: "Special: Class abilities require wearing clothing or light armor. Additionally, class abilities require dual-wielding class weapons (kukri, shortsword, or dagger), a combination of those weapons (like dual-wielding shortsword and dagger), or wielding a class weapon with an empty off-hand."