First, I need as much intelligence as I can muster on what they are both capable of. Seishirou was simple enough to analyze, as those witnesses are still alive.

Dio, however, has been entirely disingenuous in regards to his abilities. What reports we do have are inaccurate. As soon as I analyze their abilities matched against those who volunteer, I believe I will be able to formulate a pincer.

What CAN be said is that they respond to challenges. They're both disgustingly arrogant and like to prove they are better. This is the first weakness I will exploit.