Game_Actor, skill_effect & enemy question

[lambchop]

Is there an easy way to check to see if an enemy is using a skill in battle, not a hero?

I'm trying to set up the game so that there is an easy, medium, and hard mode. In this part of the script, I'm trying to magnify a monster's skill attack if the player has the game on hard mode.

Here's what I've got (this is in Game_Battler 3, in skill_effect):

      #is monster using a skill?      
      if ???
       
        if $game_variables[66] == 0
          value = skill.power * 1
        else $game_variables[66] == 1
          value = skill.power * 2
        end        

        skill.power = value

      end

 

[Yeyinde]

if self.is_a?(Game_Enemy)