YEM DMG EZ

module Z
  DAMAGE = "min + rand(max-min)/2 / spd + 0.4*atkstat - 0.2*defstat"
  NO_WEAPON_STATS = [5, 10, 2]
end

class Game_Battler
  def make_attack_damage_value(attacker)
    atkstat = attacker.atk
    defstat = self.def
    min, max, spd = (attacker.actor? ? attacker.weapons[0].stats : nil.stats)
    damage = eval(Z::DAMAGE)
    damage = 0 if damage < 0                        # if negative, make 0
    damage *= elements_max_rate(attacker.element_set)   # elemental adjustment
    damage /= 100
    if damage == 0                                  # if damage is 0,
      damage = rand(2)                              # half of the time, 1 dmg
    elsif damage > 0                                # a positive number?
      @critical = (rand(100) < attacker.cri)        # critical hit?
      @critical = false if prevent_critical         # criticals prevented?
      damage *= 3 if @critical                      # critical adjustment
    end
    damage = apply_variance(damage, 20)             # variance
    damage = apply_guard(damage)                    # guard adjustment
    @hp_damage = damage.to_i                        # damage HP
  end

end

class NilClass

  def stats
    return Z::NO_WEAPON_STATS
  end

end

class RPG::Weapon

  def stats
    self.note.scan(/<stats:[ ](.*) (.*) (.*)>/i){|min, max, spd|
    return [min.to_i, max.to_i, spd.to_f]}
    return nil.stats
  end

end