Well, Lordknight says so I'll just gain heat and do things, now!
Ignoring the gross misuse of Modus Ponens and the circular logic being used, I see what you mean.
You can't just throw out 13O or Daisharin, though. It doesn't work. You can trick people into running into them or maybe, if you manage to complete a combo, you can drop it on their heads, but I think it only works because people aren't good enough to block all of it. Some people are, even if you're throwing more stuff at them during it. I think it only works because they are bad.
So - combos leads to Oki, but if you can't hit your opponent because your hit left them in the entirely wrong place on the screen, what do you do now except maybe hit D and hope you set the staff right for this mistake?
I don't get 3C->13O. Isn't it better to 6C->13O? It combos. When wake up you'll be trying to hit them to hit them into 13O instead of just hitting them with it from the start.
Unless I'm not doing it right and somehow 3C->13O does combo and I'm not in the right spot.