Reply To: MAS I Home › Forums › CAS Exams › MAS I › Reply To: MAS I January 26, 2021 at 3:42 am #2767 OlmsteadParticipant Mahler was the most significant in helping me pass. Given that you’re on your third try now I would just get the Mahler Seminar slides rather than the whole manual. It will give you the final boost to pass this thing.