If you want the biggest bang for the buck and want to be sure you are really getting off and not some placebo effect you can't go wrong with salvia. I'm hearing alot about kratom but haven't had the chance to try it. It's also a blast to watch your friends do salvia. Hours of entertainment as you watch your friends and they watch you getting goofey as hell 
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Those who would give up essential liberty to purchase a little temporary safety, deserve neither liberty nor safety- Benjamin Franklin |