You won’t go wrong here, but I would use Alpha GPC at 600mg instead of the Phosphatidylcholine for better power output.
Caffeine should also generally be to tolerance. Experiment prior to race day.
If you aren’t getting drug tested, Halotestin an hour prior is a good option, or Winstrol if you can’t afford/find Halotestin. I’m talking about acute drug use here, not a steroid cycle. These will acutely stimulate your CNS for greater power output without causing any pumps.
A couple glucose tabs or a shot of honey almost immediately beforehand can help you feel energized.
^This is all assuming sprinting, not distance.
Hydration prior is critical as well. No amount of proper warmup can let you safely reach your max power potential if you are dehydrated, but you also do not want to be bloated. So sodium is critical, but you can overdo it. 4-500mg with fluid and stable carbohydrates that don’t sit heavy in the gut or make you crash is probably a safe bet. Again, experiment.
I’ve used this MST product preWO for a bottle and the difference is undeniable. It works.
Yes, just 12.5mg ephedrine will allow better breathing and power output. Great suggestion here for a sprint.