This is my scenario.
Empress weapon normal 6
Speed increase inner ability -1
Kaiser gauge thing (I forget what it's called) -1 (i believe it was as i recall that it doesn't stack to give -2)
Kaiser's Majesty -1
Green Potion -1
This would bring a normal weapon from normal 6 to speed 0.
Now if I were to use a fast weapon, such as a Stonetooth, would that drop to -1? Or is there a hard cap of 0?
One more thing. The increase atk speed buff in dojo, would it stack in the above scenario?