There isn't one, or at least you need to define "best" much more precisely.
To take a naive example: imagine you have four forwards. Two of them are excellent finishers and will score lots of goals if given opportunities, and two of them will create lots of opportunities for other players, but not score that many goals themselves. The best team ...
Both players were in an offside position from the initial pass forward, as can be reasonably seen in this YouTube highlights video, starting from 3:14:
Because one of the offsides was close and a clear goalscoring opportunity was created, it is considered best practise to keep the flag down until the GSO has passed. Then, if ...
The goalkeeper having the ball is just like any other player having it. The ball is in play.
The Laws clearly state when the ball is out of play:
The ball is out of play when:
it has wholly passed over the goal line or touchline on the ground or
in the air
play has been stopped by the referee
it touches a match official, remains on the field of play and: