Question about damage Dex vs. (Str + Attack power)

[Exni]

But Carraway must had done extensive tests on this, being the author of guides. Probably I should have gotten a much larger sample shots. Headache now ( - _ - )"

I didn't know Carraway had tested this. Did I miss that somewhere? I think he was just suggesting how you could go about doing more accurate testing. For your most recent tests though (I know before you were changing multiple stats), was the only stat you changed DEX? And if so, by how much and what piece of gear or materia are you using to do it?