Been researching awhile now seeing how the e/c stack was substituted by the yohimbine stack but that led to loss of libido and going soft during sex so I quit that all together...its been a year since I've taken a stack and i've been sluggish on my cardio and workout so I want to get back on one. I've read up on AMP and Venom and it looks like AMP is the better of the two since Venom has the limp dick side effect. Should I go back on the E/C stack or try AMP? Recommend me something thermogenic if you would. Thanks OT.