I simmed 4 different careers over one season to test.
Leicester (predicted 8th)
Finished 5th (72 points). 96 goals scored (#1), 69 conceeded (#5). 12 losses, only 3 draws. Beat most top teams (City twice).
Vardy 41 games 41 goals. Maddison 46ga 20g 16a. Albrighton 14a, Gray 13a, Tielemans 13a.
Didn't perform well in FA Cup, reached semi of Carabao (vs Liverpool).
Got a couple of injuries, nothing crazy, but Vardy for example missed 7 weeks.
Toulouse (predicted 16th)
Finished 2nd (73 points). 11 losses. 80 goals scored, 50 conceeded (quite a lot, most from top 7).
Koulouris scored 26 in 39, Dossevi assisted 11 in 28.
Didn't do much in both cups.
Got injuries, Gradel being out more than half the season (arguably best Toulouse player), Dossevi out over 3 months, Sanogo 2 months,...
Mallorca (predicted 19th)
Finished 7th. 57 points, 74 scored (4th) but 72 conceeded (16th). Hernandez sored 24 in 40 games, Kubo scored 17 and assists 7 in 38 games.
Didn't get much injuries.
Frankfurt (predicted 11th)
Finished 1st (67 points). 2nd offense, 7th defense. 21 goals in 24 games for Andre Silva.
I picked Frankfurt for Europa League, and that was very bad. Knocked out 2 rounds before group stage.
Overall great tactic. Overachieved in leagues. Never did anything in cups, unfortunately. Strikers seems to score. You'll conceed goals though, and probably take quite some yellows.