honestly all that may be a bit of overkill and their attempt to strip you of your cash. i cant see needing much more then the main three. grow big, big bloom during veg and maybe using all three, although i dont see the need going by my run off readings, other than a little bloom big or tiger bloom during flower. unless the ppm dropped off i wouldnt need to add grow big. right now all my plants are getting is a little bloom big and cal mag. next week when i shift them over ill flush them then start tiger bloom every other watering. i will hit them with sledgehammer a week before i start just feeding them water near the end.
thats just me im sure there are plenty of others with better info.