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I still crash from this. In my opinion the best carb source for around and during training is MTS Nutrition Carb 10!

I like to backload on Friday with depletion prior to a show

For some it can pump them up, but on the flipside focusing your energy into the movement and not making noise will lead to more output and focus on that movement

Not really at this point, but Drop Factor might help!

When you can get 12 reps easy, raise it!

For me it is nutrient density with high amounts of micronutrients and less "processed" parts

The LD50 is GRAMS. OD on caffeine would be very hard to do. With that said, 3-4 doses of 500mg or less with 4-5 hours in between would be at the high end.