Battle FFA - score calculation update

[okuni]

Hello everyone!

Following the result of the Discord survey, the score calculation for the Battle FFA will be slightly modified.
The previous values:

• Win: +500
• Lose: -500
• Draw: -300
• Damage received: -0,3

Nouvelle valeurs :

• Win: +500
• Lose: -300
• Draw : -150
• Damage received: -0,2

Enjoy