You are absolutely correct but you're wasting your time. Both of us have posted multiple times in this thread saying there's no evidence that anything but attacking with a total of TH+8 has any effect on the proc rate aside from SA/TA/Feint. They keep asking about modifiers that almost certainly aren't there or how much the TH proc rate lowers with progressive TH levels, which does happen but there's almost no need to know the exact math behind it; wear TH+8 to get the maximum effect (or max TH+ that you can wear if you think more than +8 makes a difference for some reason).