AC root bark how much for strong peroral dose?

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Hi! How much to use for one strong expirience?
I follow this guide to cook formosahousca, but just affraid to use 60gr for 4 doses, as it is about stem bark.

http://www.scribd.com/doc/18291069/A-Guide-to-Brewing-Asian-Ayahuasca-

 

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okay, in about to hours i'm going to do 4gr Syrian Rue and 6gr of Acacia Confusa root bark...