Yeah also his Vivrecard called him chief of staff after opened the doors justice and being hyped tsuru dude has this low bounty
But those bountys were before the revenge war and probably increased after that maybe there's Still a chance that laffite did something huge also lets not forget that the only one who will be increase x2 is burguess since dressrosa actions and if he gained a powerfull df he could go to 5th to 3rd stronger
And for the fights imo there are only three who seems clear
Luffy vs Teach
Zoro vs shiryu
Ussop vs augur
Even chopper vs DocQ doesn't seems clear since he is shinigami and brook is death