1 Luffy ALone wasn't even able to resist one BM punch, he was fully weakeness.Than means that Luffy+Sanji it's good enough to resist one Yonko Punch. Not to defeat him, but to resist his punchs.
Luffy prob evaluated more than Sanji and Sanjis contribution was not that big seeing Sanjis spectre didnt even budge Doflamingo
2 One gigant fishman, which was fully burned in seconds....
Help against Wadatsumi
Help against Doflamingo
Help against Sheepshead
Help against steel door
Help against BMP
Help for baking
Even though he can use steal function he didnt save Laws subordinates
He couldnt save Momo from Kanjuro
3 Help... and 1 DJ kick....Zoro wasn't able to defeat Hawkins XDXDXDXDXD Which has the same range as Sheephead, and we've seen that in Beast Pirates crew strengh/Power is all that matters for Rank. Not time, it's strenght. F for Zoro?
Hawkins is there for weeks and has the same rank as Sheepshead after one year Hawkins rank will also be superior
4 He didn't knew Doffy's hability, and he though he was a physical combatient... The same as Luffy.Luffy could have fainted if it were not for Law tolding him Doffy's hability.
5 One Anti-physycal-attacks Steel Door. And he was able to damage it.
6 Escaped The Biggest Yonko Crew with Help. Even Roger's Crew would have fainted.