Doffy on Jack’s tier? Are you trolling or what? You think Oda is going to team up Law and Luffy for Jack? Not even Jozu is on Doffy’s level, let alone Jack who got manhandled by Ashura Doji.
This guy is saying Sanji got so strong that he surpassed Vergo, Law, Luffy and Luffy/Law combined. That is stupidity of the highest degree.
Sanji is the exact same level he was >= Veterans. Now with Raid Suit he’s >= YC2.
No, because Jack is more limited with his CQC style, he is not as versatile as Doffy, so ofc there won't be a need to team up those two against him. Rock, scissors, paper. And anyway, that was far from being a team vs Doffy.
But that doesn't mean that on overall he is weaker than Doffy. He has other qualities which would make up for this handicap.
Jack had the upper hand against Ashura Douji when he went on guard and serious, reread.
Yes, Sanji surpassed Vergo long ago, in WCI.
Luffy and Law only combined their strength twice against Doffy (and not really combined, since they only switched places). Luffy dealing with the Black Knight is only another typical stall element in Oda's writing.
By your logic, Law fought 1 vs 2 against Doffy and Trebol, which is not the case since it was only in some punctual moments of the fight at most.
That fight was far from being a proper 2 vs 1. And later is even clear when Luffy mentioned about Doffy being injured and Doffy mentioned about Luffy being tired, meaning that it was more a 1 vs 1 (either with Law or with Luffy) with some situational moments. So there is no point in bringing up this to the discussion here about Sanji's lvl.
A proper 2 vs 1 against Doffy would look similar to Jack vs InuNeko.
Current Sanji > Sanji WCI > Sanji DR
Pretty simple, progression, like it happened during all the manga.
That's why Sanji now can deal with Queen and in WCI could only deal with Oven or Daifuku.