@jeppekroezen
Thanks for you Answer, if you mean my "D:\atlas\ShooterGame\Saved\00\Config\WindowsServer" and "01" for the two running shards, then thats what I did. If not, could you please explain what you mean?
Edit 1: I use "AltSaveDirectoryName=00" and "AltSaveDirectoryName=01".
Edit 2: Those work:
[/Script/ShooterGame.ShooterGameMode]
PerLevelStatsMultiplier_Player[0]=3
OverridePlayerLevelEngramPoints=5