Just checked on my 2nd team who has been running on autopilot and with an illegal formation.. 5-4(DM)-1 and it's in 4th place lol.
But another thing is... It was in a level 6 cup and it's in level 3, it never had a high average for its level. So I guess even if I lower my team to a 4* average, I'll still get level 8s in my cup...