Here I will place all the people in this war. And its up to you guys to make matchups for these guys.
Luffy vs A Vice admiral- Luffy Barely wins.
Kizaru vs Luffy- Kizaru is about to kill Luffy until Rayleigh/ comes in and saves him.
Kizaru vs Rayleigh- Shanks or Rayleigh wins.
Mihawk vs Shanks- Mihawk barely wins.
Moria vs Kaidou- Kaidou rapes the hell out of him.
Whitebeard vs Blackbeard- Whitebeard.
Sengoku and Aokiji vs Whitbeards Division Captains.