120-130ppm N is all you need. More will likely cause issues.
6.5pH is what you want with jacks. It is buffered to get to this point. Increasing to 6.5 will improve N uptake. Jacks is made to be used at 6.5, and i believe it mentions this on the lable or their website. You can find a PPM breakdown on their website somewhere too.
full strength is something around 140ppm.. it's usually too high.
don't know how autopots work, but if they recirculate, that adds complications. Otherwise, set it up to irrigate with 20% runoff each time and get rid of that water -- drain or outside, but not soaking your marijuana plants. Allow it to mostly dry.. this will guaranatee consistent concentrations in substrate, consistent pH, consistent mcriobial biome etc etc etc. I'd ditch the hydroguard unless you run into a lot of problems with dampening off... easy to avoid with good watering habits and without using an extra product.