The objective of any tactic is to score more goals than opposition as often as possible.
That target can be achieved in multiple ways, but it's important to make sure all efforts contribute to that end.
Green is a high intensity tactic with focus on defense. It is as good as ZaZ Blue, but trades attack for extra defense.
It is a Gegenpressing with a strong midfield trio, including an ever dynamic roaming playmaker, to provide short passing options and control possession.
It uses a false nine to create space for infiltrations from the flanks and from midfielders, dividing goals evenly between those positions.
Like any Gegenpressing tactic, the main behavior of Green is to retrieve possession close to the opponent's area to counter the opponent's counter-attacks.
You should use Light Green 5.0 when you want to rest your players and avoid bookings, thinking about the rest of the season. I recommend using it anytime you think a match is under control, like two or three goals of difference.