Really anything's up for grabs, people play enough different opinions.
Generally these are where people play (dependent on number of players/who's around):
Striker - Leach/sayo/gator
Wings - Kongs/Sayo/Orlando
CAM - Kella/Sour
CDM - Sour/Kella/Gator/Deadmong
Drunk CBs - Leach/Gator
Backline...
Lol, second game was 4 man backline, I just played with the defaults. These are the first games of FIFA 19 I've played other than clubs. Maybe figure out an offense other than giving it to Ibra.