Something to consider too is other stimulants in preWOs. Not that you need to count their mg up, more just to consider everything you take that pushes on the adrenals ultimately has a cumulative cost.
From what I have seen in competitive powerlifting, some people really use a lot of caffeine and/or stimulants. They do what they feel it takes to get an edge (or justify their desires). Coke or amphetamines used to be rampant in some circles - and there are also absolutely top guys that think a scoop of C4 is only for their heaviest days. Some people use no caffeine at all. Doesn’t really seem to be correlated to size either.
So take what you like, and what you feel is acceptable. I wouldn’t really go off other people. Them doing meth should not be a good justification for you to