Reppuzan said:
All of your proposed revisions are completely and utterly baseless and entirely built on your opinion. We operate on evidence here.
Well, let me tell you why my revisions hold some kind of credit.
It says on Burgess' profile that he's low 6-B because he should be comparable to Katakuri and Cracker. That's not true. Both of them have much better feats than Burgess. Katakuri casually oneshotted Gear 3rd Luffy, did more damage to Gear 4th Luffy than Doflamingo, and his Strength Mochi attack should be at least as strong as Kong Gun (Chapters 784, 879, 884 and 891). Cracker almost cut off Gear 4th Luffy's arm and is able to infinitely spawn biscuit soldiers stronger than Gear 3rd Luffy (Chapters 837 and 838). Burgess oneshotted a fighting fish, which is a feat even Caesar, a 7-B Character could do, and he only destroyed a couple of buildings with the shockwave of his attack (Chapters 710, 737 and 787). Yonko commanders are by no means equal, just like Vice Admirals aren't equal.
Diamante cut a space smaller than a city in half and distorted the same area before that (Chapters 768 and 776). By the way, Viola should be scaled down to 7-C, because her feats aren't that impressive as well (Chapter 712). Also Jora, a comparable character to Viola is only 8-A, so 7-C Viola wouldn't be wrong.
Ace should go to 6-C for two reasons. First, his strongest attack was smaller than half of an island (Chapter 441). But, there's nothing that says he can't spam the attack, so he shouldn't be lower than 6-C. He did that attack without any signs of effort. Second, he was equal to pre-timeskip Jinbe. Jinbe got stronger over the timeskip, since he showed the use of strong Haki after the timeskip and his newer feats are much more impressive than those pre-timeskip (Chapter 890).
Vista was the hardest one. The reason why I said he should be 6-C is because Mihawk didn't even pay that much attention during their battle (Chapters 561 and 562). Plus, he's comparable to Ace so scaling him to Ace wouldn't be wrong. He can still stay low 6-B though, because we haven't seen much of him.
Finally, Magellan should at least be 6-C because his Venom Demon can destroy Impel Down. That's just a statement but keep in mind that Magellan oneshotted the Blackbeard Pirates with his weaker poison. His stronger poison is obviously more potent and spreads much faster (Chapters 544 and 547). Impel Down is an island that gets bigger and bigger the closer it gets to the ocean floor.
Sorry I don't have any calcs, but that's only because I don't know how to do them. If I did, I'd add them.