Do NOT use something with Yohimbe, Rauwalscine, Yohimbine, Quebracho, R. Vomitoria or any other name it will be listed as - being allergic to yohimbe is very real, over 20% of users I've heard estimated by some bro study. The important thing is, I know it f*cks me up and it does for many guys - and real like anecdotes matter more than bs studies anyway. Everyone else usually has good times, but if you're allergic you'll know cuz it will drag your training down for sure and last much longer than you'd expect. Like 4-5 hours usually for me.
I made a last minute move to use a product w/ yohimbe on meet day this past go around, when I was already so totally focused on squatting 501, and my anxiety & heartrate were so horrific I nearly vomited. I could barely warm up, was sweating profusely, and looked like death. It was nearly impossible to control my thoughts and fears, or keep my heart down, and it just exhausted me. And I never get nerves like that. It finally wore off my deads and I was ripping PRs left and right and felt great the whole time.
Whatever you use, start playing with it now - no last minute adjustments. I strongly recommend something with Amentoflavone. Olympus Labs' Demi-God version of Conqu3r is pretty awesome. Add some creatine mono and g2g.