Lafitte having a background info shows he is important but doesn't mean second strongest or third. Lafitte has skills that others don't have, navigation and hypnotism, and he can fly. Great combination. But if you are searching for power Burgess must be the strongest of BB pirates after the captain pre-Impel Down.
Burgess's power was highlighted more than others; beating some pirate in mock town and screaming as champion and getting the attention of Luffy and Zoro. Then throwing a two storey building while jumping at the same time. And then talking about how good that Ace fought like a warrior in impel down when they see Luffy meaning that he is interested in that area more than others, then Dressrosa feats etc , all but strength and power feats and Oda foreshadowed that when Burgess gets the top level devil fruit he wants, he will be very powerful as he is already. While as I said Lafitte is also very important, his skills has been highlighted in different areas. We don't even know if he can use Haki yet while Burgess is already confirmed as two type Haki user. Though he will probably use Haki as every titanic captain.
Then BB gets into Impel Down to gather more Burgess type power houses not very skilled people like Lafitte. BB isn't a type of guy that does unnecessary things, if he already gathered enough powerful people he wouldn't need Impel Down crew. Impel Down crew and Shiryu must be his top level fighters and Aokiji. Then comes Burgess, and others like Lafitte and Doc Q, Auge etc they are still powerful and based on what BB said even the weakest BB pirate is > Bonney since he said Bonney is too weak to join his crew. But the top level fighters must be others as I mentioned above. Lafitte is important like Nami is important for the crew.
Burgess's power was highlighted more than others; beating some pirate in mock town and screaming as champion and getting the attention of Luffy and Zoro. Then throwing a two storey building while jumping at the same time. And then talking about how good that Ace fought like a warrior in impel down when they see Luffy meaning that he is interested in that area more than others, then Dressrosa feats etc , all but strength and power feats and Oda foreshadowed that when Burgess gets the top level devil fruit he wants, he will be very powerful as he is already. While as I said Lafitte is also very important, his skills has been highlighted in different areas. We don't even know if he can use Haki yet while Burgess is already confirmed as two type Haki user. Though he will probably use Haki as every titanic captain.
Then BB gets into Impel Down to gather more Burgess type power houses not very skilled people like Lafitte. BB isn't a type of guy that does unnecessary things, if he already gathered enough powerful people he wouldn't need Impel Down crew. Impel Down crew and Shiryu must be his top level fighters and Aokiji. Then comes Burgess, and others like Lafitte and Doc Q, Auge etc they are still powerful and based on what BB said even the weakest BB pirate is > Bonney since he said Bonney is too weak to join his crew. But the top level fighters must be others as I mentioned above. Lafitte is important like Nami is important for the crew.