Well I can't agree with that last part. Mingo isn't that powerful. Fuji is the only one who's that powerful here, not Mingo. Luffy doesn't have to focus completely while fighting someone like him. If they're going to be on par with each other in this arc then that obviously means that the difference in power isn't as big as it would be if Luffy were up against an admiral such as Fuji. Even if the WB commanders continued to fight against the admirals they would have still lost. It was inevitable even if they were to somehow win that war. Basically while the WB commanders put out full effort into their attacks the admirals wouldn't be doing the same. As you could see from Punk Hazard a fight with powers as big as admirals pulls islands into their destruction. A good example of how big Ace's full powered fight can be is the fight we've seen with him fighting Blackbeard. They used their strongest techniques on that island and were only able to take up at least 55% of the island into their destruction. The admirals took 100% of that or maybe a little bit more. This is a good example of the time with the percentage we have here for the entire series. It can show you that we're barely halfway through the entire series. At such a amounts of power it tells you that Luffy is at the correct level of strength after TS and that is right up there with Ace. Chinjao could only handle Luffy's normal state of power. I bet that Luffy could have turned that entire Colosseum into rubble if Chinjao pushed Luffy passed his limits. Oda isn't going to spoil the fun of that amazing fight that should take place soon. He's saving that hype for the finale that will rock this entire arc.