Island strike system

[YouSeeMeRunning2]

Implement an island strike system. The purpose of a strike is to punish cheating islands.
Island strike(s) reduct set values (percentages normally) from an island.

Placeholders such as the following would be nice
%superior_island_strikes% returns total strike amount
%superior_strike_worth/value% returns the total value after reduction
%superior_strike_amount% returns the total lost amount

Configuration can look like the following:
Strikes:
1: 15
2: 30 #Define the percentage deducted from total island worth
3: 50
4: 75
Worth: true #Should strikes effect worth?
Level: true