A tag team would make Luffy look bad. Especially when he has yet to go all out.
Saying that Doula Mongo is too good for Luffy's arsenal is based on what? Luffy has already shown to be fast enough to see, react and dodge the strings when he saved Kyros. And he didn't even use CoA.
A way more likely scenario would be Law confronting Doula first, losing, and then Luffy takes over after dealing with somebody else.
Not so much of a team effort but both will be doing something, we just dont knw what Oda has in store for us.
As for the kyros scene. Luffy was able to see the clone come up from behind, giving him time to race up and save Kyros, these types of scrnes are seen a lot in One Piece and other series. As for One Piece, take Ivankov saving Luffy from Kizaru when he didnt see Kizaru. It doesnt make Ivankov stronger than an Admiral simply because he/she was able to be quick in response amd save Luffy. Thats not to say Luffy isnt able to take on Doflamingo.
To me Doflamingo is clearly stronger but it does not mean Luffy cant defeat him because of that. I mean, look at every other villain Luffy has thought, particularly Lucci and crocodile.
Then again, whos fight is this? Its Laws. Laws reason outweighs Luffys.. Then again my prediction is it will be a repeat ofSmoker vs vergo then Law comes in to fight. Except in this case Luffy isnt 1 shotting anyone.
Until Luffy fights Doula properly for our sake, and see what little thing Luffy has over Doula, we will all say "ahh" so thats how, just like with any other villain, shoutout to crocodile.
If i were to bet on anything, it would be that Doflamingo does not have CoO whereas Luffy does and that could result in his downfall