By far the best system I have ever used is 4-3-3 with;
GK
WB CD CD WB
APM DLM APM
ADV PCH ADV
Team settings, attacking, direct, normal tackling and pressing on
It has got bath city to the premier in 6 seasons, with Man City I am in 2019 and have won the last 5 leagues and champions leagues and Real Madrid win the league by 18 odd points every year. Just have to make sure the players are green on the formation screen and not out of position, and that the midfielders can ideally play in that role, the others don't see, to matter