problem with multiple strategies score calculation

[martinpovolny]

• given the strategies can only penalize_by and reward_by one by one and there is a top/botton limit
• given the order of strategies is not defined
• given we start with the worst possible score (in the default case)

we can get 2 different resulting scores for 2 strategies enabled etc.

(if the 1st strategy hits the minimum/maximum and the 2nd moves the score the other way)