I do not see the logic behind this. Why would you ever choose to wear blue armor? No matter what weapon the opponent has, the best armor is either green or yellow. The blue weapon is only optimal against blue armor, but nobody should be wearing blue armor.
EDIT: The deleted comment this responds to claimed that you should never use the blue armor, because against any weapon, either the green or the yellow armor is better.
It can make sense to choose the armor that is not optimal in any case if it is good enough in more cases. There are no bonus points for winning by a larger margin.
I do not see the logic behind this. Why would you ever choose to wear blue armor? No matter what weapon the opponent has, the best armor is either green or yellow. The blue weapon is only optimal against blue armor, but nobody should be wearing blue armor.
EDIT: The deleted comment this responds to claimed that you should never use the blue armor, because against any weapon, either the green or the yellow armor is better.
It can make sense to choose the armor that is not optimal in any case if it is good enough in more cases. There are no bonus points for winning by a larger margin.