time to prepare for the beast

how long would you estimate the time needed to prepare for the beast? I have my 70-270 and 70-290 and want to get my MCSA. I want to take the exam with time to retake with ms 2nd shot deal that ends June 30th. I read a few chapters a while back but got off track and also have my ccna(its been a while) Trying to figure if I should go for the beast or maybe a easier elective that i could take before 2nd shot expires.
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Comments
Personally Ive had 6 weeks and I still feel I have so much to do to be confident on passing the exam and I feel I could possibly pass 50/50 chance if the right questions come my way. Ill sit it in 10 days or so but i sure aint confident so it depends on how you found the 270 and 290 exams & how long it took you to complete them. Id say perhaps you should allocate 15% longer study time than the 290 for the 291 exam.