Fortress Attacks: Updated

[Lissy]

As Leander mentioned,

If your fortress level is higher the gained resources are reduced by a certain percentage. If your fortress level is higher by 3 you cannot win any resources at all!

Target: fortress level 10
Your fortress: <= 10
Stone won: 1500

Your fortress: 11
Stone won: ~ 1100

Your fortress: 12
Stone won: ~ 900

Your fortress: >= 13
Stone won: 0

Why is there no benefit from this? I mean, what if I made an attack on a certain player that has a higher level fortress than myself?

Example:
Target: Fortress Level 13.
Your: Fortress Level 13.
Stone won: 1500

Target: Fortress Level 13.
Your: Fortress Level 12
Stone Won: 1900

Target: Fortress Level 13.
Your: Fortress Level 11
Stone won: 2300
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Consider this idea please.

[slasker]

Then at least, remove the limitation that you cannot select your opponent yourself... Remove the random selection and the mushroom penalty if you want to find another opponent.