Here's how I did it,at the boss just FOCUS ON THE ADS ADS ADS ADS IS THE KEY!!!as soon as you come in murder ads doesn't matter how many believe me there's no sense in waiting for the psions to multiply and take u over its way easier to kill them,and don't just kill the kill them like your life depends on it,because it does,the only time k beat this is by doing this,there's just simply no other way.