How much worth formation and tactics for 1 or few matches

[Rev Dino]

How many stars does your team have ?

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i have no idea, i can only see the team what i run and what i see is that i have 1 8 stars player, all the others 7 stars and 1 6 stars, average strenght of a team is 129%, so to say, if an average strenght at the levels over 40th is 90% and the players become stars at 100%, they become 7 stars at 120% and 8 stars at 140%, lets say i am very strong at the moment.