def METHOD_NAME(self, method="max_exp"):
    """
    Args:
        method: EXERCISE_CHOOSE_MODE
    Returns:
        np.ndarray: Priority of 4 opponents, such as [120, 113.2, 120, 95.3].
                    Higher priority means attack first.
    """
    if "easiest" in method:
        level = (1 - (np.sum(self.level) / MAX_LVL_SUM)) * 100
        team_pwr_div = np.count_nonzero(self.level) * PWR_FACTOR
        avg_team_pwr = np.sum(self.power) / team_pwr_div
        priority = level - avg_team_pwr
    else:
        priority = np.sum(self.level) / 6
    return priority