Help. Soil setup.

What are the best soil builders? I use vermiculite, worm castings and coir in my mix. Just trying to minimize feeding by including it in my soil.

My current mix is pro mix hp with mycorrhizae as base.
Per 7 gallons my weak mix is 1 cup of gaia green alfalfa meal, bloodmeal, fishbone meal, powerbloom plus, crushed oyster shells, and 2 cups ewc.
I alternate between ro water and blackstrap.
A few teas before flowering.
Cheers