Though Jack's 321 is way better than Megacrop, it is still far from ideal. If one is interested in perfect nutrients for their girls, your best bet to to toss out the Jacks, keep the CalNit and Epsom, also get MKP, MagNit, Potassium Sulfate, Potassium Silicate and make your own micro blend using Iron DTPA, Manganese EDTA, Zinc EDTA, Copper EDTA, Boric Acid and Sodium Molybdate. Once you have your own custom Micro blend, you can target all of your macros very easily.
Sounds like it's more complicated and time cinsuming than it ever needs to be! I work 50 plus hours a weeks and have kids that need to be entertained I'm running biotabs this time around, and it's wonderful but I had better results with Jack's to be honest