I'm going through the same thing, Zicdeh, Gradd and Raen are very aware about my misfortunes in Torcleaver numbers.

I don't think it needs a buff at all. I think I'm just doing something wrong, I don't know... even if I have a lot of ATK in my current setup (and around 10 GS skills bellow the cap I believe), I can't really reach that "stactical damage" I've been dreaming about. Inside abyssea, sometimes it goes as low as 500 dmg. Sometimes as high as 3k.